I agree that keeping a mod to its essence is a great idea, and I do prefer to write codes in a 3rd-party IDE. But syntax highlighting is still quite useful here. Since I don't know yet how to debug these codes in a 3rd party IDE, the Moon Logic Combinator is still my final resort to tweak them. When this happens, syntax highlighting would be of great help.

If it's important, maybe try one of the other LuaCombinator mods, or their forks.
Don't plan to implement it here, as it's a complex thing that I won't ever bother using myself.
I think my main problem with these is laggy typing, which guess other people have better tolerance for.