Chain of Termina
I mean, I get it, you don't want everybody always playing the one map, or the game becoming Fox Only, No Items, Final Destination. But it seems like a precarious set up.
Maybe they'll change it when all the maps are released? This made me laugh! xD
I definitely think it will change and be available for your choosing when all maps are released. *OR* they will have it where it remains random for individual online 4v4 matches, but not for the mode where you can take 3 friends and fight with them against another group of 4. Nintendo has been really good about listening to what the audience wants, so I'm sure they will have options for choosing your own map.
If I had to pick something that I think will hurt the game, I would say it would be the lack of local multiplayer games. My boyfriend and I share a Wii U, and from watching the Nintendo Directs, it looks like the only mode for local multiplayer is a 1v1 course where you focus on popping balloons. While I think that would be fun, I think it will get old very quickly. I hope they release more modes for local multiplayer after its release.