Originally Posted by Kholai
Thematically, Engineers are inventors, that means they come up with things, which in turn means that they must have things that other inventors do not. With a limited number of inventions they know, each of those inventions (short of retraining) is unique to them.
Ok, so long as you have a built-in retraining mechanism, I think I'd be good with it. But otherwise, at level six you are stuck with your inventions you chose for the rest of the game.