Great 5.3 is now officially launched! Looking forward using all the new goodies and improvements.
Too bad GPUlightmass still has a bug regarding IES light patterns. Reported this a few months ago. Its still designated as ‘fixed’ in the bugtracker - UE-156122. It was broken in 5.0, fixed for 5.1 and broken again in 5.2 (and 5.3, 5.4 github). Hoping this gets noticed by someone of the team.