It sound like Olympic Stadium is going to ask the Quebec Gov't for more money to update the interior Olympic Stadium once the roof is replaced.
https://www.youtube.com/watch?v=USRyfPFf-qo
This is audio only, but the main points were they fixed the technical ring/roof, but the stadium inside is old and outdated. Here is the highlights:
Need to replace seats
Update the lower bowl to be more modern (but still accommodate soccer, football and baseball)
Update suites
Update washrooms
Update concourses and concessions
Update stadium audio and video
Goal is to attract as many events as possible: concerts, monster trucks, car shows, etc. as well as CF Montreal (in the winter at least) with the new MLS schedule, possibly the Alouettes for some or all games, Grey Cups, as well as baseball (exhibition, neutral site games, maybe)
So the billion dollar stadium is going to get an approx $870M reno on the technical ring and roof as well as they may need $300M more for internal renos....Yikes