Dude, 1hit kills have HORRIBLE startup and recovery frames where if you miss you probably eat massive damage. Not to mention you lose your super bar which means NO Faultless Defense so if people keep pressuring you, you cant use it to push em back a bit. I forget if you can use your Burst Gauge or not afterwards but if you cant then you are stuck with no way to get out of certain things. Not to mention..you can easily get chipped to death. *Venom Ball pressure traps come to mind right away* 1hit kills are extremely dangerous to use not because it kills you in one hit, but because of the things you are putting on the line. Only time i can see it being used is if someone is dizzied and are stupid, then its a free kill, but i cant see it otherwise being overpowered.

Sol is fine in the latest GGXX Game..in Reload he can do a Dustloop ;i where its practically an infinite of some sort. In Slash you can still do it, but the timing is so precise you probably screw up. Sol is like Iori...in every KoF he is up there with the rest.