If it were cheap, I could impulse buy it, and the packaging were some exquisite Vintage-esque design, I'd be into it because it's such a central character, and I'd actually leave it packaged which I rarely do. It'd be kind of centerpiece-ish. As it stands, like Nick said, it's barely a notch above a rehash of the original Vader Evo set...
I totally love Evolutions though... Really a dropped ball in terms of what they COULD have done. Especially if they delved into the concept level... Concept, Figure, Concept, Figure, Concept, Figure... a 6 figure set would prompt me to drop some coin, especially if it had new McQuarrie figures in it.
Concept RFT, RFT, Concept Hoth Rebel, Hoth Rebel, Concept Endor Rebel, Endor Rebel... I'm there in a heartbeat.