I guess Training mode would be EXTREMELY useful! It's so bad that I always encounter grandmaster players, and I don't stand a chance! It would be a mode where you can select from Match/Team Match or CTF! The players would be you, and computer(s)! You could even choose computers to be on your side! The main ,,Practice" meaning is that fact you can set the computers' skill level!
1.Training doll (Stand in one place, do nothing! It's very useful for practicing sniping from far places!)
2.Baby (Acts like someone who just downloaded SRB2: only uses red rings to attack, and hardly move!)
3.Easy (Uses every weapon and move more, but still cannot defend itself good, and uses weapons badly.)
4.Advanced (Moves normally, use every weapon, but may miss easily, but tries to defend itself, but may fail...
5.Master (Moves fast, thinks every movement, uses weapons handsomely, also defenses itself, and can't be shot easily.
6.GrandMaster (Beware, a mechanic awesomeness! The ultimate enemie! Moves the MOST precisely, almost never fall off, uses weapons so awesome that it will snipe you from the other end of the stage! Also, it will run around you until you run out of rings, then shoot you.)
Yes, this IS VERY complicated and hard to do, maybe stupid, but I would love it from the middle of my heart! :)