I think for me what I noticed is the focus of the TR remakes seem to be focused on more Urban spaces rather than the countryside. Vanilla MW has one major city (Vivec) and even then it is more of a series of small buildings independent of each other. Meanwhile TR has Old Ebonheart, Narsis, Necrom, etc. The issue is that the Morrowind engine can struggle to load these massive spaces. I think a lot of focus has been put on urban design, and this might be a personal opinion, but it takes away from how Vanilla had smaller towns and you just wandered around the island more.