Interesting to hear / thanks for sharing; but since you have read this thread - just be aware that it could lead to issues (obviously, nvidia is using that Intel instruciton for a reason - even if we haven’t noticed any problems directly, as of yet… which for me, is a couple of months of use, now).
Here’s an xorg-server patch to priority-raise ready apps which I think is smoother. It applies to xorg-server 1.14.5 also.
I’m also trying the patch in this thread (here it is as a nicer diff) - will report back with any issues.