Other than a height mismatch, I don't see much of a problem. Peta would look taller than Charlie, if she in heels and they are not doing contemporary.
I'm loving Amy, Charlie, Danica and James.
Count me in as one of the few who hasn't warmed up to Meryl and Maks. A lot of their "dancing" seems more of posing, jumping, fake kissing etc. which could be attributed to Maks' choreo or lack thereof.