As an honest answer, I'm another that agrees with the general sentiment in this thread.
The biggest issue is a lack of a roadmap. I know you don't necessarily agree with this, but when half a feature is implemented (Take the example of Artist Images), we have no idea when (Or if) this is likely to be completed.
I also think that sometimes, there's a little too much of the programmers running the shop
My earlier example of Artist Images is a prime case in point- This requires dropping images in an esoteric folder with esoteric naming to make it work at the moment. Programatically very neat, and I'd guess pretty simple, but needs the more complicated UI work to make it shine.
-Leezer-