No, that would be the worst of both worlds for me. :) The appeal of the QC over the FM3 (apart from usability) mostly comes down to the additional I/O and extra DSP. (Having an additional processor and lanes to accommodate other instruments, high quality reverbs, whatever.) A "mini QC" might eventually be nice to have connected to an amp for "live" applications, while the big QC would stay connected to my PC as more versatile studio hub. The presumed benefit would be (partial) compatibility between the two, and consistent usage, so I'm not scratching my head and re-solving problems half the time.
As it stands... every other day I decide I should lose the FM3. Owning both platforms is a distraction, and the QC is more versatile and easier to use overall. (That's not a FAS vs. QC thing - it's specific to the FM3, which has its own unique limitations.)
On the other hand... I do prefer the sound of some of the amp models in the FM3, and I know I've only scratched the surface in terms of the variety it brings to the table. This makes me think: just keep the FM3 around for the "library" of FAS content. But trying to come to grips with the FM3 and make the most of it is taking time away from playing guitar, whereas the QC is pretty much plug-and-play, what you see is what you get.
Serious first world problems.