I got super prepared for Oblivion to be as complex and difficult as Morrowind and was severely disappointed by it even at launch. Skyrim was slightly better than Oblivion in terms of mechanical complexity (dual wielding, how magic works, the forts, etc), but also even more streamlined in others (like how skills and leveling work).
I’ve played the absolute shit out of all 3 (as well as FO3, NV and 4) though. There is just some inexplicable draw to them. And it’s that very thing that Starfield lacks that had me rush the MQ and just stop playing once it was over.
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.
Oblivion’s leveling didn’t change from Morrowind, it also had that flaw that could really fuck you up if you didn’t optimize getting extra points in the minor skills before the major skills.
I enjoy that Skyrim made leveling up simply a matter of gaining X points across skills, but how they ditched the attributes and went for +10 on one of Health, Stamina or Magicka made it feel kinda dumb.
