My sense is it comes down to if your a driver or transit user:

The BMO option is assumed at retrofitted stadium to bring it up to professional standards. If you believe MLSE, Two england-style roofs, upgraded seats, expanding seating/boxes, to 25-30k are a must. Closer to IGF in winnipeg. You get transit access and Friday night games are an option, but you have to scheduling conflicts with TFC and field turn over time.

Vaughan-ish ultra-suburan option would be bare bones Tim Hortons Field style. 90% drive-in/drive-out. Probably saturday night/day games only for traffic. You get the dates you want and control the facility. You can combine the stadium with practice facility are other pluses.