everything will be balanced out in 1.3. Right now you are seeing only part of it. Just like in 1.1 you saw only part of the melee system. once 1.3 comes out. people like trunks. who in the short run are good but in the long run suck, will probably change to in the long run good and in the short run lol. Krillin is a good example of in the long run he is good. But in the short run he sucks.
Krillin is still a very balanced character even as it is. He has scatter beam shot, khh, solar flare. He's not a bad character. It's just his speed, starting pl, and pl trans that brings him down.