Hello again, devs! Just leaving my feedback, like promised.
The game modes are done fantastically, so I won't have too much feedback to give here.
1) Private matches: There were a couple times where I wanted to face off against some of the people I invited to play the alpha with me, but there was no way to set that up. I'm almost positive there will be once the full game comes out, but like I said, just some feedback.
2) Practice mode: Again, i'm pretty sure there will be something like it in the full game, but a good practice mode would definitely help players improve, which in turn would result in more intense and interesting battles, which is what keeps players coming back for more. Akin to many fighting games, a practice mode where you could choose not only your character, but also your opponents character, map, and a few other settings would do a tremendous amount of good for everyone from beginners who just need to work on their muscle memory and reaction time, to experts who want to experiment with different feats, in different locations, against various opponents.
3) Spectate mode: Not sure if this is going to be in the game or just reserved for official tournaments, but being able to drop in and spectate your friends' matches would be a fantastic addition to your game.
That's about it. Your game modes are fantastic!