Plain jane isn't what i'm seeing. Sure, he has less colours overall than the Cybertron version, but the silver will look spectacular i think - this mould is known for it's extensive detailing. Just look at Buster Prime & Comic MP Grimlock to see how much better large toys look when fully painted. It looks more like a collectors piece than a kids toy - which is fitting for the 2010 line whether our wallets like it or not
It's hard to see in those official pics but i think, like 2010 Unicron, he has some panel-lining which'll bring out the details even more.
Some more pics to halt the Primus-bashing!