i didnt read this whole thread but my point on a few things:

1> playlist

huh? Thats SOOO simple to create and it is for me exactly how i think it should be... I open up my collection in Artist or Album mode (i do miss the album artist view by the way!!) then i select an album and i long press to get the context menu or go through the top menu and say add to current play list.. I do that a bit more, searching (just typing the first chars) and i add a few albums more. Then go to the media players current play list and say: Save play list -> fill in the name and done.
Then when i want to play i dont go to artist or albums view but playlist view and yes its there and i can play it.

It could be me but that is exactly how i think it should work.

2> Browser not smooth

I have created my play list so now i play my songs. then i open up the browser and load engadget.com. Then i start scrolling. smooth as it could be no lag at all. So i dont get what i do wrong to not get the smooth scrolling.