So here are the difference between 2024 and 2028 and my opinions:
Aquatics
In swimming the 50m backstroke, breaststroke, and butterfly were added while the women's water polo tournament will now have 12 teams. Additionally, 11 men's athlete quotas were transferred to the women's side.
In general, I'm okay with the 50m events and despite women's water polo having shallow depth I am happy they are now equal to the men. The IOC still wanting to keep the core sport quotas to 10,500 is a bit ridiculous, but I'll go into that at the end. While the athlete split isn't shown for the disciplines it's quite likely swimming loses 11 men and women quotas each (maybe they might take a couple from diving/marathon swimming).
Archery
Mixed compound team was added.
I've been a big supporter for compound archery being added to the Olympics. Unfortunately the individual events were not added which I dislike. If you are going to have athletes in team event then they can also compete in the individual. I would like to imagine World Archery is slowly bringing the event in. Since no new athlete quotas were added recurve will have fewer archers competing. I imagine recurve will be a 48-52 person tournament.
Athletics
Mixed marathon walk relay was removed, mixed 4x100m relay was added.
I feel the program has become worse with this change. Not that I felt the walk relay is important, it's not and I wish we would get the 35/50km walk, but at least it preserved some race walk. The mixed 4x100m relay adds nothing extra to the program. This will be repeated a few times, but a mixed event should not be added with the gender component unless if fundamentally changes the event. There's no need to have both a men's/women's and a mixed 4x100m relay.
Basketball
The 3x3 events will be a 12 team tournament. The athlete quota has increased by 32.
Great move. It was ridiculous that the event only had 8 teams so the increase was much needed. Honestly, if we weren't stuck on the 10,500 athlete limit I wouldn't mind seeing 16 teams.
Boxing
Women saw an increase of one event, equaling that of men (7 each). The weight limits of each category was slightly adjusted.
Equaling the event size between genders was expected and I'm glad they decided to increase the women's count rather than reducing the men. The women's athlete quota remains the same despite the event increase, but still remains the same as the men.
Football
The men's tournament was reduced to 12 teams, the women's tournament increased to 16 teams.
I'm glad the women's tournament is up to 16 teams. The qualification system for Europe has been brutal and I imagine Asia will be happy too. I wished they didn't reduce the men's tournament, but the 10,500 athlete quota limit forces them to do so. Ultimately, I agree with the move as the women's tournament is more prestigious.
Golf
Mixed team was added.
I await the chosen format, but ultimately I think it's a good idea to have the event.
Gymnastics
Mixed artistic team was added.
What a weird event. As mentioned before since the men's and women's team remain this is a useless event that doesn't need to included.
Modern pentathlon
The athlete quotas has been reduced by 8 (4 men and 4 women).
This was likely done to reach the 10,500 quota limit. Overall I dislike it, but it's not the end of the world.
Rowing
Lightweight double sculls have been removed. Coastal single sculls and coastal mixed double sculls have been added.
I'm not familiar with coastal sprint canoe, but from what I've seen in videos I think it will be a nice event to have. Losing lightweight double sculls is a bit of a shame and I'm not sure I would make that trade given that coastal rowing isn't well developed yet.
Shooting
Mixed team skeet was removed, mixed team trap was added.
The mixed team shotgun events continue to be cycled. Considering they don't use any additional quotas, I don't see why they don't just have both at the Olympics.
Sport climbing
The combined event was removed and replaced by separate lead and bouldering events. 8 additional athlete quotas were added.
Finally the sport has its proper individual events. I still commend the strategy of going with the combined event in 2020 as a type of Trojan horse with the idea that the IOC will want to keep it.
Table tennis
The men's and women's team events were removed. Men's and women's doubles and mixed team were added.
As a person who likes doubles table tennis I am happy with this change. To keep the athlete quota consistent mixed team is almost necessary.
Tennis
Mixed doubles was removed. Mixed event was added.
While I wasn't a big fan of the mixed doubles event (it's barely played during the ATP/WTA calendar, I don't think we need it replaced by a mixed event. The format hasn't been revealed, but I imagine it would be similar to the Davis/BJK Cup format. My fear is if they're attempting to add the event to the second week as I imagine many players will opt-out.
LA Only Sports
Baseball/Softball, Cricket, Flag Football, and Lacrosse will be 6-team tournaments and Squash will have 32 athletes (16 men, 16 women).
While expected, I am very disappointed that the team sports will only have six teams. You can't showcase the sport really well with such few entrants. Cricket is a great example, there are many smaller nations which play the sport, but we are likely to see only the large nations compete. Squash only having 16 athletes is also a bit small, but it's at least manageable.
Final Thoughts
Some good, some bad moves overall. I need to stress that the 10,500 athlete limit among core sports while increasing the number of events is not sustainable. The 2000 Olympics had around 10,600 athletes yet only had 300 events. We now have 341 core events, an increase of 14%. Even if you want to argue that there was bloat in 2000, the 2024 Olympics had 327 core events, meaning we had an increase of 4% yet no new athlete quotas. While some of these new events don't need more athletes, some of them do. Honestly at minimum the athlete quota for core events needs to be increased to 11,000 while more realistically we should be closer to 12,000. If the IOC doesn't want that many athletes then they need to remove events/sports.