There’s been an update in 5.2 for RVT Sample node, I tried it out but the Feedback thing was already checked with no noticeable improvements. Also getting some insane frametime, definitely have to run with these commands: r.VT.MaxUploadsPerFrame 8 r.VT.MaxUploadsPerFrameInEditor 12
Three versions in and still no hope for RVT mipping fix, it may actually be getting worse.