Saywer did things in IWD2 that I liked but that was IWD2 and this is not IWD2.
Around the time IWD2 come out I was starting to get burned out of D&D and FR setting in particular, I did got ToEE but it was not set in FR.
Also NwN2 is build over NwN and I have a strong dislike over that game, I dont get much hopes over NwN2 (I doubt we see things as climbing, swimming and ridding) since I suspect it being nothing but a rules and graphics update over NwN.
Even with Saywer involved I dont think that NwN2 will be somthing worth my time to play, its simply going to be NwN 2.
Good thing is I doubt Saywer cares much about me buying the game or not, that is what I like about him is that it seens that he does not compromise his game design to appeal to the masses, he makes games that he thinks work and not games for other people to play and that is how games sould be made.
Its hard to sell me a D&D game, let alone a FR based game ...