I would like body types as well as more voices. I know voice acting would be expensive (assuming they pay appropriately) but it would be nice to have more than two male and two female voices. I do miss that about NWN 1&2 is the voice packs.
There are already more datamined Tav voices - they just weren't in the game yet as they weren't finished.
Hopefully with the extra voice lines coming in Patch 5 when clicking on your character, we will see more voice options too? Not sure.