I know what your saying about the paint. It annoys me too. Not sure how good th 2010 paint is. Sure shines nice.

I also had a 1995 and 2001 Protege and the quality of the interiors were passable, but nothing great. Parts quality was also mediocre in some cases. my 1995 dash lighting and A/C compressor went as did one of the window regulators. Still mechanically the car lasted well over 150,000 miles.
You're right about the 2010 doors. I forgot to add that when I looked over at the lower part of the door under the handle it seemed a bit bare and lacking in design cues. I noted the same observation you had regarding the seats. Though they still functioned perfectly but can't hold a canlde to the MS3 seats, which are fantastic.
Still I think at the price there has to be some cutting. What shows is how good the designers are. They know enough about how people interact with their car to know where to put the money. For instance how many people actually touch their lower door area all that often? You may only look at it when you exit the car.
If I had crawled around on the floor and footwell area I probably would have seen more lower quality plastics. The interior of the glovebox and storage area in the center console (like the 04-09 3) didn't have textured plastics or extra padding.