Articulation's part of toys, and being that toys are what I want to collect I say the more the better GENERALLY. The Marvel line I'm familiar with enough, but I generally don't collect them.
This figure, to me, is close to perfection... Hasbro's SA Clone or Durge MAYBE best this though, with their VERY excellent use of Ball/socket joints. Unfortunately where 21st excels Hasbro doesn't, and where Hasbro excels 21st doeosn't.
To me, the SW line's severely lacking in this single area more than any other. Rubbery accessories are dealt with, absurd distribution's a fact of life, oversaturation's been with us since vintage days. Articulation is an area they just are reluctant to tread.
21st's figures are incredibly poseable (as are BBI's) and look AMAZING displayed. Truly impressive little pieces of plastic, and even with pre-posed interchangeable arms they really add a dynamic there for "static pose" collectors.
Bottom line though, articulation is the #1 area that makes a toy, and more focused an action figure, a truly fun item to play with. The popularity of poseable toy lines should be a guide for all toy lines... G.I. Joe, Marvel, LOTR, Stikfas (and similar), BBI Elite Force, 12" military lines, etc...
Lots to learn from there. I'd love to see Hasbro wind up doing figures in their SW line as well as the SA Clone or Deluxe Durge were (or VOTC's). Incredible sculpting, articulation, and deco all in one. Keep salt shaker senators and the like, but go all-out on the rest.
I'd even like a more dramatically posed side-line alongside the poseable basic line at the same time. Like Unleashed, but in more "realistic" poses and in the same 3.75" scale. A 3.75" Han running (circa DS Escape) looks a LOT more fun for specific dioramas when you've got VOTC Han to pose however you want and play with.