Installed my own homebrew ISO. Custom theming is broken. Uninstalled, back to LTSB. I only tried it to check out the better Dpi enhancements, but not worth it at the moment for me.
Also that's the first time i installed a "regular" version of this OS - albeit still stripped of all the usual stuff, no cortana, store, apps, telemetry, onedrive, defender ect, but the difference between LTSB and regular Enterprise with all the same tweaks there seems to be still a lot more crap running even with all the same basic stuff removed, services turned off, task manager and group policy set up. Like LSTB once stripped down and tweaked you don't really need a game mode. The difference between the two that i see, Enterprise Rs2 has about 70 processes running with basically no software installed, while my LTSB Rs1 has about 40.
Also the custom color pallet for the UI now gives you a full spectrum of color to chose from, but still really only accepts certain accent colors, lol. Like if you try to pick something too dark it won't let you and just picks an approximate pre selected color. At least it did for me.