Subtracting the "rantishness" I tend to agree on several points, but it does sound like EF have woken up. Maybe P7 delivers. Let's wait and see. The first 4 reasons certainly sound promising.

Points 1,2,3 (and 9 too a bit) are really at the core of the problem. At one level Poser is supposed to be for amateur users and has a chunky user interface that tries to be friendly, but slows you down in the end. (As you mentioned IK on/off, the mirroring dialog box that you have to click away etc) But then on the other hand you can't really use any of its (considerable!) power if you are not an absolute expert and can work out what the cryptic rendering options are, the obj export options, you have to be able to understand and hack cr2 files, even if you install an item you need to know exactly where in its guts (called runtime) poser keeps each bit. The technology for dynamic clothes is there, but it is so slow and cumbersome it is hard to believe. For a conforming item you press conform and basta. Why should the process be any harder for a dynamic item. Poser has all the information it needs and all of the technology.

I am still hopeful though :-) there are a few more reasons left, the next weeks should be interesting.

The trick is to make it easy for amateurs, yet open enough for experts. Look at Silo for inspiration.