Deep or not, I hated the levelling system of Oblivion with a passion. Needing to micromanage which skills I increase for each level so I can get a good attribute increase was such a micromanagement pain, especially when everything kept scaling up your level. Often I felt like I was getting weaker, not stronger, when I leveled.

I'd much prefer they replace the system with something different (like how it works in fallout 3) than what they did in Skyrim where they just carved out all the annoying bits and left barely anything behind though.