On the most part IMO they are totally different characters with a nod to the originals.
Scotty is absolutely different. Its a shame but hey Pegg's character is cool too just not Scotty.
Thats the way I'm going. I accept they have new characters with the same name as the old but not with 79 episodes behind them.
I think they could have stuck a little more true to the original spirit of TOS but that's not the way they decided to go. They've done their best I suppose.
As harsh as the cross-dressing Saavik comment is to some extent I suppose its true, you don't get to see the inner turmoil in Spock or his humour the way you did in TOS