Exactly. Since this K7 is a more budget friendly devise, features like MQA, Femto-clocks should not be added.I would say no to that. Why pay for a format that price gouges for minimal if any improvement and locks you into very specific hardware that will pass the licencing fees on to the end user.
If anything Fiio should put up a survey and see if people are willing to drop more money for MQA.
MQA could be added to upcoming Flagship models.
Topping did this nicely with their devices like D90 DAC.
They make D90 without MQA for lower price & D90 with MQA for +$100.
I think AK4497 dac is ideal for this.
It is not the AKM's flagship DAC(AK4499) anymore, so it is cheaper and still a relatively new device but AK4493 is on older side now.
And if I'm correct, you can make a "True-Balanced" DAC using that even though it only has 2 Channels.