I don't think an upclocked Airmont would be able to hold up; Cherry Trail is likely to be outperformed by the Cortex A72/A53 big.LITTLE solutions that the likes of Qualcomm and MediaTek will be shipping later this year.
Assuming they can be delivered in time. Please see the link about yield issues above.
If SoFIA MID is a 2016 part, and if Intel wants it to be competitive with its ARM contemporaries, it really needs to pack Goldmont CPU cores. Given that the original SoFIA wasn't on the roadmap ~15 months ago, I'd assume SoFIA MID is a new addition to the family that was defined fairly recently. Intel's product planners should know what they're up against, and if they decide to put in a ~2.7GHz Airmont, SoFIA MID will not hold up well against TSMC 16FF+ A72s.
SoFIA MID is to compete with the A53 AP's not the A72's that's what Morganfield was designed for so why are you comparing it to a high performance AP? Again if TSM was tasked with A9 at the last minute it seems capacity at the bleeding ARM edge has all been allocated to Samsung and Apple. The rest of the ARM vendors won't have anything at 14nm / 16nm until 2016 at which time Intel says it will be close to bringing 10 nm online.
