I don't think JOJO is talking about any particular issue. He is talking about the way ATC has been designed. I have stopped using it, because it is very unrealistic and not fluid.
I know it must be a real pain to program such a vast thing, and I know some work is being done over it by your team, for X-plane 11.10. So I'm waiting with no real expectation.
But at the moment, X-plane ATC is definitely behind what has been done in other sims. Even though I have many ideas, I wouldn't file any report about that because there is too much to be done and you have other priorities, which is totally understandable.
My opinion about ATC at the moment : it is something to be done online. It is just too complicated to code something satisfying, even if i would love to help.