I'm sorry you just can't recast the characters and have them be at all the same characters. Getting an actor other than the primary actor acting a character to play the character is ok as long as it's a secondary part of something (like River Phoenix as young Indy in Indy 3's prologue), and maybe it can be tolerated otherwise if it's necessary for a story that just HAS to be told, but it should be avoided otherwise. A huge amount of what a character is is defined not by the writing or the directing but by the actor's own nature, which influences how they make the character come across onscreen. If you take a character and switch the actor it's no longer the same character. Spock played by Quinto is NOT Spock. Kirk by Pine, Urban as McCoy, Pegg as Scotty, etc -that's NOT the same characters. And frankly, Quinto's Spock is an insult to the character. I had enough watching Quinto do mediocre work on Heroes, I didn't need him doing mediocre work impersonating Spock too. They shouldn't have gone back and fucked with the old Trek. They should have continued on with the stories they had already developed. I'm sure there was something they could have done with that stuff that would have worked. Better no Trek than this drivel.