I saw some Utapau Clones tonight at another WM and I didn't think they looked bad either... Not great, but not as bad as the white Clones with the yellowing. A shade between clean and that figure is where I'd put it.
The Stormtrooper helmet is an ok sculpt to me... ok enough I guess, but I'm still replacing it with a Spacetrooper helmet. There's enough discoloration I notice it. The paintjob is sloppy as **** though, so I'm completely down on that... The brow bar thing is like Burt's unibrow.
No pic, nothing short of a crummy cell phone anyway, but yeah, it's not bad really... I'd say the Sandtroopers I've seen have worse yellowing on their thighs, and the white Clones are way worse. I've only seen 2 Utapau Clones so far though, since they seem to be the worst of the worst when it comes to this discoloration thing.
The stormie looks good enough to me though beside the paintjob. Paintjobs are really getting the axe these days on many figures though. I guess it's like marketing, it's usually the first thign to get cut when times are tough.