See, this is why stopped coming here, cause as you suggest something, no matter what it is, someone slams you down. I mean, is it that hard to say, "i dont like this idea" or "hmm this idea isnt for me", noo you have to flip out and call the idea ****. Honestly, if you dont like the idea, then just say so, but be civil about it.
Now on topic, what the hell are you talking about? EVery beam isnt a huge beam, a little generic beam is smaller then a kame and has a heck of a lot less power behind it. And if they make a beam big enough that uses up all their ki, then they wont be able to fight, or maintan ssj. Any time a ssj or any other character for that matter exhausts their ki, they are kinda screwed and stunned.