First of all, for the "anti's" there is no solution that will be acceptable in any way shape or form. 

The big ski jump today is technically obsolete. Around the time of the 88 games, there was a change in jumper form ( advent of the V ) resulting ability to fly significantly longer distances, out of sync with the curvature of the hills. The COP hill is less than ideal and a 2026 facility can be added to the Nakiska site. Fortunately, ski jumps are a relatively low capital requirement.

Bobsled/skeleton/luge ... As I understand it, the biggest problem with the track is the ammonia refrigeration plant which was fine when COP was outside the city. Now that it is surrounded by urban sprawl, it is a safety risk. Also, note that after Whistler, there seemed to be conscious efforts to slow tracks down ... Its still exciting to watch live events where 130kph is still fast and  1000th's matter.