The way I see it is that the FS makes up for a charcaters weakness or stregnth. Like tonights Ike update. I have been hearing that IKE is very powerful and so is his FS, but it's range is extremely limited, which balances him out. Peach is has always been light and damage prone, her FS allows her to severely reduce her damage. Bowers is slow, but his FS has the ability to kill all of those speed characters. Metaknight who seems to be the best (so far) of the new characters has a very powerful, yet very limited FS, this sort of negates him. You see what I am getting at? Another example is the invincibility issue.... Yes Some SF say "They are invincible during this " and I have seen others that say "He is invincible while in the middle of this move" Both od which leads me to think that the Final Smash is indeed the equalizer. For some characters they will need it to survive and others will just need it as a threat because using it wont help them as much. Where as a character may seen a little broken that is rectified with the FS. Post your thought...