I don't really see the connection. Crystal globe is just adding up points, it seems pretty fair as long as there is the same amount of races in every discipline while the combined always has favored slalom specialists. Someone who wins 8 out of 10 slaloms has a case to be considered a better athlete than someone who won 6 out of 10 downhills (and to get some kind of recognition for being the best athlete of the season).
You could say that the alpine combined, where the best slalom skiers are usually at the top, is a bit like nordic combined where the best cross-country skiers usually always end up at the top. The difference is that noone is specializing in the alpine combined, so basically you are just giving an extra medal chance to athletes who are already medal contenders in the downhill or the slalom. In the nordic combined no ski jumpers/cross-country skiers are competitive. If the alpine combined would be designed in a way that makes it (close to) impossible for slalom/downhill specialists to win medals, then it would make sense to keep it, but i don't see how you could do it. In this century (5 olympics) 60 % of the medalists in the alpine combined won a medal in one of the other events as well. Only 1/6 of the medalists in the combined didn't finish at least top 8 in an other event at the same olympics.