Simes-pep - i know in theory MQA has more to it than compressed high definition, but the effect of DSP profiling (or more accurately in my opinion DAC reconstruction filtering) will only actually truly benefit if the original ADC filter at the recording studio matches that profile. Remastering MQA that has already gone through an ADC filter profile - ie its its already in a digital domain - won't really cut it - all it will do is got some extent lock you into to an MQA interpretation of the sound.
I was discussing with Rob Watts recently - and he suggested to which I agreed - it is a big limiting factor in the industry right now - as there are only a relatively small number of studio ADC devices used world wide - although he said he had a few projects in that regard but kept it close. We did discuss MQA in passing and concluded its kind of missing the point in this regard because of the lack of encapsulating the end to end chain.
But as I say I believe MQA remastering is missing the point as its a bit like capturing some dead piece of nature in amber, for the real benefit one would need to get the filter reconstruction mapping matched right across the audio chain, not just repurposing to produce a specific master.
Also remember, not unlike the RIAA preamp compensation for phono, MQA requires a filter to compensate for frequency errors in the 'unfolding' reconstruction process and this can be used to slightly boost and enhance the sound to make more aesthetically pleasing - a bit like a hitec tone control .. nothing wrong with this - but if this is your preference there are probably more effective ways of achieving this.