What it seems to me is that you're worrying about becoming one-dimensional when at your current level, one-dimensional poker is all you really need. So what I'm saying is this isn't just fine, it's actually good for your game because it makes you concentrate on the basics that will be fundamental to your play as you move up in stakes and play against more skillful villains. It's almost impossible to focus too much on the fundamentals - the more you practice playing "correct" poker, the more it becomes second nature and the more it provides you with the basis for making more interesting plays.

Although your desire to grow as a player is admirable, it's simply not going to be possible to do this against players who only think one-dimensionally. The plus side is that the players you'll encounter on the next couple of levels up aren't a good deal better, though a lot more of them will have a decent grasp on the fundamentals, so you will need to be able to at least match them on this level. Even here (I am thinking the $5-$10 tourney levels), you will make the vast majority of your profit against donks who make fundamental errors, but you will be able to begin to experiment with more interesting moves against the players whose ABC skills are fine but who can't deal with people thinking outside the box. So really, until you're at this stage, any frustration at not being able to explore higher-level poker will actually retard your progress rather than helping it.

Poker is all about understanding your opponent and playing accordingly. The best example of this is when you are in a hand vs a calling station and you try and complex multi-street bluff with air. You will lose - not because you played badly in a vacuum, but because the opponent you were playing was not sophisticated enough to make the leaps of judgement your play required he make.