I doubt you will meet a price vs performance value uptick. I don’t see any quantum leap in design or build.
Anecdotally, a local AV dealer invoked a similar upgrade comparison to the current very top model SONY OLED fiat panel TV; versus its predecessor very top model from two - three years ago. Practically, the actual audio/video performances uptick was minimal at about 5% and Fuhgeddaboud all the schmoozy marketing crap thst the latest and greater is a must-have upgrade = Coughing up the not insignificant cash for a nominal 5% odd performance quotient.( minimal in any case)
Vis-A-Vis AVR’s, in short, recent year over year model upgrades fail IMO in the price vs performance because the current models are not needle movers over recent prior year similar build models. ….mostly it is a bells and whistles differences only.
I’d wait until ( if and when) ARCAM makes a significant build upgrade published in external reviews …AND …yiu stress-test it via a personal store audition before I’d shell out the cash from an AVR30 to an AVR31.
ARCAM is arguably already the very best AVR brand out there .