Adv mode I wouldnt even know where to start. People would have to tell me what to change/add.
I've done a bit of experimenting in Adv mode and found a few things that may be of interest. Overall, it's looking very good, but there are still twbt bugs that render it unstable.
My wolfman started in a human hall. The transparent overrides look great, as do the status indicators - note the gentleman slumped next to a display case. It's a small change, but the status indicators enrich the experience of visiting taverns and halls, making it easier to keep track of who's doing what.
I wandered outside and took a look at some of the locals' gardens. That rectangle of random sprites is a collection of garden plants, and the glitched sprite that is displayed for each plant appears to be consistent.
After wandering off into the wood, the sprites switch back to their correct overrides after a moment of stutter. Two of the plants shown here, the cranberries and bitter vetch, were also in the garden. There appears to be a crossover of about 15 tiles, where you can keep running back and forth watching the overrides flicker. The game stutters every time this happens, sometimes followed by a ctd.
I also took look around a treehome as an elf. As you can see, npcs look great, but my adventurer became rather fruity every time she walked over leaves.
In short, Adv mode is actually already looking great, but twbt is glitchy and appears to cause crashes.
EDIT: Thanks to falcn for fixing the embedded images!