Dink Heckler wrote on 09/20/12 at 13:27:51:

The refinement of the Catalan is also my worry, compared to my chess-level. That is why I posed my question. By "stunts" do you mean "hinders"? (English is not my native language and I couldn't find it in my dictionary) But maybe, just because of the refinement, it could HELP my chess development?

Of course it is.  Why wouldn't it be?  In just about every main line White can develop quickly and efficiently, put his pieces on natural squares, and get a decent game. 

This same question could be asked of many openings and I'd give the same answer.  Is the Ruy Lopez suitable for lower rated players?  Of course it is.  Will a beginner know or understand all the intricacies and theory?  No, but he's playing good, logical, straightforward moves and can get a playable game even when he plays "inferior" moves like 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.Nc3 or 5.d3.

The only exceptions I can think of are those lines that are extremely complicated tactically or strategically (Botvinnik Semi-Slav, Winawer Poisoned Pawn), or that break a lot of "rules" (Alekhine's Defense).  Otherwise, just play chess, develop your pieces quickly and efficiently, control the center, and don't worry about the "name" of the opening you're playing.  Just PLAY CHESS.