One combo for every character and introduced "Maximum Damage" — of course, MK4 has good balance. But why don't you think MK2 is not balaced?UMK3, MK4 and MK9 are the most balanced MK games
In UMK3 the characters with useful infinites are not even top, except Lao
On the other hand, almost everybody has relaunches. A few charachters that can perform projectiles in the air even can do a corner infinite.