I'm a little concerned over the fact that FAF allows UI mods, but not all UI mods are merely adding functionality to the UI.
For example:
Having a mod that automatically shuts down mass fabs for you when you can't power them isn't a UI mod. That's a gameplay mod. A UI mod for that would allow you to select all your mass fabs and turn them on/off.
IMHO - the blurry line has been crossed and we are firmly into gameplay mods being allowed territory.
Honestly, the ladder shouldn't allow these types of things at all - no mods at all. Ladder matches should be played on equal ground. I like hotbuild and gaz-ui, but they are a part of FAF now. If it's not there for everyone, it shouldn't be used in ladder.
For those who will say to me that I can get the same mods, that's true, but, I barely can find the time to play FAF now, much less spend time keeping up with the latest mods. I'd rather spend my time playing and not chasing the latest mods down.
Opinions welcomed.