Other then having to regrind all you gear again. Troopers needing both cannons and rifles, and Operatives needing rifles and snipers. Inquisitors and Counc. needind two types sabers
Doesnt exactly ruin the game, but I know A LOT of current subs would quit this game if AC respecs came into play. (I am one of them) So it would destroy the player population.
It would destroy the appeal of the game.
And it would only attract people like you who want everything handed to them.
I bet I can find you on a WoW forum asking why Blizzard wont allow class changes. Why you cant change you paladin to a warrior.
All I have to say is quit being lazy. You want an OP class? Go level one.