Hey,
You shouldn't really compare it with Morrowind. Rather with Oblivion (in certain terms).
* Landscapes (the whole world, in fact) it is indeed hand-crafted, and, in my opinion, surpasses Oblivion auto-generated and repetitive maps in many ways. I like Oblivion, but I consider G3 superior in terms of landscapes.
* While I never understood why people complain about G1 / G2 controls, I must say they are completely reworked in G3, each weapon type having unique animations (like dual-wielding vs two-handed weapons) and fighting styles. Well, mostly you can click-click-click-click-to-win, if you play on Easy difficulty, and without Alternative Balancing.
* Magic effects are also superior to those from Oblivion (imo).
* Be ready however to die a lot, at least in the beginning of the game if you're adept of a more reckless playing.
This is how Gothic 3 looks with the latest patch (included in GOG version) near the starting area.