But that's the problem with NWN1 over NWN2. It's also one of the big reasons there are so few NWN2 modules that have been released:
It takes too freaking long to build these maps.
NWN1's use of tiles allowed anybody to go in there and make something reasonably cool (in terms of a map) in about 10-20 minutes.
I've used NWN1's toolset for on the fly map making during game sessions for use with a projector - and I can do it in about 3 minutes.
Tiles are great for some purposes. Don't underestimate their utility.
That ease of use is the sort of tool that will find widespread use among gamers. While the ability to endlessly tweak a map is nice, you need to be able to give people the tools to make a GOOD map in 30 minutes.
Dundjinni takes too long - far too long. A great map in the program is a 6-8 hour exercise. CCPro3 and DD Pro 3 take forever to learn and at the dungeon scale, they look cartoony and pretty damn crappy too - and they take a long time to build too.
To be useful, a modern 3d map making program needs, in my view, to offer amazing output, giving non-artists the tools to create maps using shadows and shading - and be able to do that in a VERY short period of time. For that, you need to make all these tools far easier to use and to bury the tweak and by pixel height map adjustment. Sure, a few users might use it and that's fine - but for the mainstream? They want ease of use.