I think some of the armor in TW3 look great, and would love to see Bioware try some for their games
I agree. As I mentioned before they are based on Real world designs. The same thing goes for the clothing as well. They are based on armor and clothing used in the late medieval and renaissance periods, around the 1400s and 1500s.
Bioware doesn't have to limit themselves to one area for their designs, but the usage of real world designs is good because it had to stand up. Since we could be going to Tevinter, why not have byzantine inspired armor, or persian, or perhaps even some indian? Clothing is actually far more important to Dragon age then the Witcher. Since we can play mages who often do not wear armor but clothing. I wouldn't mind seeing a few female magisters wearing something similar to an indian sari 
As for the small isolated villages, they are not useless nor just filler to make the world alive. Often times they tend to have say an inn or a herbalist or a shop of some sort. Sure they are in the middle of no-where, but when you are in an area surrounded by monsters they become highly valuable. It is really good to have a place return to.
In regards to the darkness of dragon age, the odd thing is that inquisiton could have easily been much darker if they SHOWED us the darkness, especially from the books.
For instance, if Val Royeaux, and I have ideas of how Val Royeaux could be vastly improved, had the elven alianage(which I am surprised it didn't) then it could have revealed stuff about the various factions before the ball. You could have people talk about Celine's burning down the allianage and show the ruins and people whom were injured or lost relatives. Then you have Gaspard and the Cheviliers and their hazing ritual of going around the slums and shanking the elves who are caught outside the area, one could show that happen or see the aftermath of it to the elves. For Brialla's faction, perhaps you assist or get ropped into allowing her agents to kill a family that opposes elves including children.
Dragon age often is said to have Racism, but telling us that doesn't help when they don't do much showing beyond "knife-eared" show us the oppression.