I've heard the big O plans to retain a baseball configuration?
Seems like a mistake, unless this baseball configuration is heavily scaled down from the previous baseball configuration?
Trying to keep the big O alive as ballpark just seems like a fruitless endeavour. If a renovation is going to be successful I think it should be almost entirely focussed providing a world class spectator experience for rectangular sports, and not retain any sort of goofy multi use stadium design features to allow for a baseball configuration. I don't think the MLB would even let a Minor League baseball team play in Montreal if the plan was to play at Olympic Stadium.
Soccer and football have a lot fewer games per year, which makes the trek out to Olympic Stadium far less of a pain in the ass than it was for 80 home games per season with the Expos.
Montreal might have been left out of the World Cup due to the state of Olympic Stadium, but with a proper football/soccer renovation, perhaps it could host the Copa America one day, and maybe even host the finals.