"Higher than expected idle VRAM clock using multi-monitor setups on Radeon™ RX 6000 series GPUs"
Is not fixed for me, or at least my 6700XT behaves as it always has, though we've been told in the past that high mem clocks with multiple displays is to be expected and is normal behaviour.
So not really sure what's expected or what this is attempting to fix?
Main monitor is 1440p@144Hz, second monitor is 1080p.
If I run the second monitor at it's max 120Hz, then mem clock is always at max with ~30W GPU at idle.
If I run it at 60Hz then mem clocks down to ~30MHz and ~6W GPU at idle.
This changelog item has been clarified on the release page. The issue was that specific displays would cause your GPU mclk to idle at 50%, whether they were on their own or within an array that'd typically idle lower.
You could either be impacted by VBI or display bandwidth (not sure on your secondary refresh rate). VBI is intrinsic to your display. You could work around this via custom resolutions in Adrenalin to get 144 Hz idling low, but that's pretty advanced.
For what it's worth, I have a similar config to you ([Asus VG27AQ | 2560 * 1440 @ 144Hz] + [Asus VS248 | 1920 * 1080 @ 60Hz]) and I can idle at about 24 MHz with a 6800XT