Level scaling is never fun and never will be, I think. There is no progression if your fights with early enemies are just as hard as they were 50h ago.

You could probably design around that by providing in-depth build options such that optimized builds outscale other entities of the same level. Later game enemies themselves would be optimized better and better. But that's really hard and I've never seen it done. Why even provide a dynamic build for each enemy with each level if you could just have a normal non-scaling progression?

These systems often lead to me avoiding combat altogether. While not exactly a crpg, Oblivion was more fun to me without ever leveling up (which was optional, but made fights kinda pointless).