A GM might be much more liberal with those than in Dark Heresy. After all which Watch-Captain is going to say no if an Assault Marine wants to learn Step Aside at Rank 1 or 2?
Such liberalism might undermine the progression system though. Otoh, Deathwatch is just the type of game where the players are supposed to be able eventually custom tailor their super hero with quite some ease.
How are you going to handle elite advances in your game?
Alex