Arena looks a lot like Daggerfall, though I didn't play much of Arena really.
However, I did play all of Daggerfall (or a lot at least heh) and funny enough: I think it's a better game still than Morrowind. Morrowind may have the uniqueness and the graphics, but Daggerfall has the "realism" of large nations, cities, villages, guards, closing hours, etc.
Both had bugs too and by the last patch both are highly playable really. Although it's unrealistic to hope for, a remake of Daggerfall would be nice heh. In the end though, I'm hoping The Elder Scrolls IV: Oblivion (or so rumoured) will be equally interesting. After all, I only recall Daggerfall giving a glimpse of how Oblivion looked like.