Wow - have a goat people....  The guy simply expressed HIS opinion on some rooms.  Said in the first few sentences:

"Poser should be modular with plugins like 3ds max or lightwave, that way you buy just what you need and it does not become an overbloated app."

Then went on to discuss which features he uses and he doesn't.  Didn't say "GET RID OF ALL THE ONES I HATE"

It's hard to even read here lately.  What used to be a nice friendly helpful community , now every time I open a thread I see people who are hunting forums for a reason to argue with someone and jump all over them.  Instead of trying to see points you agree on, lets try to find some way to argue.  Debate is fun, but you don't have to be rude about it.

After all that, I do very much agree with the OP.
I also agree a few points down that I'd rather not see it reworked from the ground up because if I know programs, it will break everything if they do that.
Rather I would see significant changes implemented.

First and foremost the render engine.  It's absurd.
Secondly I agree on changing the materials room to where I can actually edit the textures while inside the program.  Layers would also be very very helpful. On the other hand there are already powerful apps that can do this, and perhaps the price tag on those reflects these programming implements.  If so - than I will thankfully - continue to switch to my image editing application while counting my $600.00 saved doing so.
Convenience usually comes with a hefty price tag.

I am:  aka Velocity3d