I finished Risen not so long ago.
I agree with most: it has the gothic feel, but an awfull end boss.
I could live with the dungeon crawling in the end, the other G's had it too.

I actually liked the dungeon more than in gothic, because of the puzzles and the traps.
What I did miss was the close connection with some of the npcs. You made friends in the gothic games ( or at least at G1 and G2) while I didn't really connected with anyone except Patty.

What I am saying: I hope they combine the best of both games.
Either way I will buy Risen 2