Why not try it? If you don't like how it works out for your playstyle then you're simply a respec away from something that does work for your playstyle?

The question I would suggest asking yourself is, "why do I feel like x or y would be better than z (what I have now)?". How is the current setup working out...do you feel like you're lacking something or that leveling could be faster?

Give that each class is a hybrid and can function in 3 different specs (healer, tank, dps), you have quite a few variations that you can try.