I'd like it more as a mini game than another full match ( something I've thought about before)

So rather than "beat FC Mou!" we could have little flash challenges, more like training drills... especially if they could teach about less familiar tactics or formations.

"Pick a GK and up to 4 defenders, can you defend the net for 15' ?" Against 4-1-2, 3w3, etc.

I don't think most managers will "broaden" their play if the challenge is just another match. Maybe analysing formation and tactics in association play compared to other tournament (or even tournament tournament) will tell us if managers tend to be limited or creative.