Strictly speaking, they haven't done any same-scale v2s yet. You could argue Starscream is i guess... but not really (it's more like v0.5 since most of the changes originated with the first prototype).

That said, I think it's probably inevitable that new versions will come. The reasons from Lord_Zed are spot on I think.

I feel there's a lot that they could approach differently too - actually the cynic in me thinks they probably made a few decisions on MP-10 solely to leave that door open. Stuff like the odd transparent pieces on the groin, or overall proportions, detailed legs. Even his windscreens are quite different to the cartoon. Starscream is a 10 year old design despite the MP-11 updates so i think he could be done a lot better now, from scratch.

I love both MP-10 and MP-11 though and don't look forward to replacing them on my display. But if new versions can offer something unique and look good, I know i'll want them!