I really don't see Meimi dominating that much, I mean it's not as flagrant as Riho's possession over the lines in Only You with Ai and Reina... Meimi gets to sing with Dawa so 2 sqeauky voices together are the best combination they could come up with, I dont' see this as being Meimi centered... Plus, this is only the dance, she may not get more screentime than the others in the other shots ^^
Riho and Takechan is what they need. Nakky is perfect in Pucchi Moni. But that I think like this should be a given, as I posted my preferred lineups in that other thread, so.