Commendations are just an extra bonus for being helpful and all-around friendly. Duty Roulette story mode has given me commendations for simply explaining the mechanics in CM and I'm a dragoon. I think it's a wonderful addition simply for the fact that helpful players can actually be shown they are doing a good job too. Yeah there might be suck-ups but I'd take a handful of those over one destructive troll.

Take a deep breath and think back at any troll you've run into on DF. Now replace that with a person trying to suck up and be overly nice... way better huh?