It was great in the old RC's, it enabled you to quickly diagnose scale related rendering issues (SSS, IR / Caustics etc).
With the SSS2 shader this isn't really a problem as it's really easy to use/change the overall scale, but it would still be nice to have that spinner back
With the SSS2 shader this isn't really a problem as it's really easy to use/change the overall scale, but it would still be nice to have that spinner back