It's an good idea but like Dokutayuu said it can't be done, because you can recharge to fast. In Budokai you still need time so you are forced to fight with melee (except your'e hundrets of miles away).
Sure it would be great if there is a system that you must use ki-attacks and not only melee. At the moment it isn't. So it's more effective just to fight in melee and to use some ki-blast or low beams (because you haven't the time).
Now you can say that they can create a system like that:
You fight melee, after (let's say 15 hits) your damage-value is becoming lower.
Then you have to choose another "weapon" - while you do, the melee-damage-value is loading up.
But that sounds kind of crazy. Just thinking.. xD