The controls, every TM game up to Black had "Control Freak" as a control scheme, but for whatever reason, they got rid of it, and never brought it back. I simply cannot adapt to the standard control scheme.
The sheer amount of buttons and button combinations makes the game daunting for newcomers, but once you know how everything works, I don't see an issue with the layouts. I get where you're coming from, though. I use racing control scheme from personal preference, though the classic control scheme is best to learn from the start since it has the most manageable layout. Certain control schemes work better for specific vehicles as well.