Hmm... interesting question.
Honestly, I wouldn't add any new sport.
There are already too many strange new sports and events so I wouldn't like to add more.
Tbh, I don't follow ANY of the sports which are mentioned in the first post in this thread.
So if they are added to the programme, I wouldn't watch them much so from my personal point of view they are not important.
Globally I believe baseball/softball deserves to be in the olympics, it was there few times, I didn't watch it but I think this sport suits to the olympics.
Joking a bit - while watching Asian Games I really enjoyed dragon boats races, so this could be it for me. But I don't know if anybody practices this sport outside Asia.
Ok, maybe squash could be nice... I don't know.
More important for me would be adding quota for some classic sports (road cycling, canoe sprint and slalom, fencing for sure, but I think also rowing, swimming, artistic gymnastics, athletics...).
Rugby XVs would be great but I honestly don't know if it is possible.
And I would like to see some events coming back - M K4 1000m in canoe sprint, M C2 in canoe slalom, W 500m and M 1km TT in track cycling.
I don't exactly know which sports and events I would get rid of, but i can say which sports i rather don't watch or hardly watch when nothing else is going on or I watch only when POL athletes are performing:
trampoline gymnastics,
modern pentathlon,
artistic swimming,
taekwondo,
equestrian dressage,
field hockey,
water polo,
open water swimming,
wrestling,
may be sth else i forgot now,
but i can't say i want to get rid of them because I know these sports have their fans.
From new sports I'm sceptic about breaking, but we will see how it goes in Paris. In Europan Games it was boring for me.