The young head in a vacuum is not an issue to me. It is accurate to the book they based him on. But when you choose to do the safest version of Mandarin possible, and then include those hands feels icky to me. It's a wild choice. In the two stories they're basing this Mandarin on, he never has long clawed nails like that.. Hell in Director of S.H.I.E.L.D. he doesn't have his own hands at all. Which to answer part of your question, the ringless hands I'm sure they intend for use with the older head. In that story line, he has the rings fused to his spine, but he wears gloves most of the time to cover his prosthetic hands.. Why they included 2 sets of ringless hands is a bit of a mystery though. The yellow peril hands appear new to me, so if you're gonna do it, might as well at least put the rings on them too.
I'm also mildy offended by DoS Mandarin being an after thought in this set when he pairs better with the Extremis armor than Fraction's Invincible Iron Man Mandarin does. DoS remains my favorite modern Iron Man run and deserves it's flowers.