Im voting no here because as i see it it would cost uncontrolable ammounts for Patchou. Also Plus! Wouldnt be the same if it was a standalone, its grown-up around messenger and doing that would mean alll the features where lost.
Again a further problem is people like programs that are welll known and are all offical, a second client wouldn't be so well accepted. And we wouldn't have our 4 Million
Anyway, in my mind bad idea