On the subject of roster size; it's not some big nefarious secret that it's been reduced, they've said it would be smaller because they want the game to be easier for newcomers. This isn't a decision made in a vacuum either, it's based on feedback from Tag 2. Do you have to like the decision? No, of course not, but they've been open about it.
You could see this message pop up on the Combo Breaker stream, don't think I saw any of them mess with a controller, but I'm not 100% sure: https://youtu.be/ib0zDh4RBXk?t=64
3. Is there any info on how PS3 legacy stick connectivity will work? Is it like MKX/SFV where you have to map the stick to a Dual Shock 4 or is it like SkullGirls/GGXrd where it's just plug and play? (Please be like GGXrdRev)
You could see this message pop up on the Combo Breaker stream, don't think I saw any of them mess with a controller, but I'm not 100% sure: https://youtu.be/ib0zDh4RBXk?t=64