I had multilpe soundcraft mixers and 22mtk was the biggest letdown in terms of eq and pres.
After going thru signature, gb2 and epm series i decided to keep epm8 which is cheap as hell but is simple, reliable, rolls of highs on the inputs making things sound less harsh, smears the transients in just right amount and overdrives gradually with really nice tone.
back to the question…
Unfortunatelly you wont be able to record all track at once this way.
You can get epm12 whcih gives you 12 mono channels and 2 stereo which you can use as stereo aux return for your external reverbs/delays etc…
Personally i find digital mixers very uninspiring and boring but if you like clean, surgical sound then
sure, QU might be your best bet.
I think this piece is very interesting: