Shadowedeyes
Adventurer
I don't think there is a problem with having simple and complex classes. The problem is that it is also tied to character concept. You may be a big Harry Potter fan and want to play a "wizard" but dislike the complexity of spellcasters in DnD. Conversely, you may want some tactical decision making with your Conan expy. Right now, the martial character is not going to be as complex as the simplest spellcaster. Which means you either choose playstyle or character concept.