The new changes seem great but I just don't see enough personally to sit through the intro again.
Maybe Patch 4 would be worth a new game...
I'm currently 15h into the new patch, done most of the things in the ground and I got myself to Underdark. Killed minotaurs - because its a fun fight - and I think I'm done for the patch.
For me, it was a very positive experience a lot less bugs - everything starts to feel a lot better - there is a problem with ceilings - overall problem with the camera in caves and buildings but nothing major.
Patch 3 is great - but overall I think that it's better to wait for Patch 4 if you want to do a full playthroguh