the KOTH problem is easy to solve. Set a KOTH Channel on VOX. when chatting in the tower use VOX, announcement by the moderator on RANGE, Problem solved. 
If the CM is on a tunable channel to listen in tower, he can't be on a tunable channel listening to the fights. And F12 range, as it stands, does NOT cover the whole fighting area so that does not solve the problem.
To my knowledge you cant tune the F12 channel and as it stands when you fart in the tower and happen to have the mic open, everyone hears it. [ only one close, lets say he's pushing it away

]

Good thing nobody has wished for smell-o-computer

And I wouldn't say HTC messed up. They made a change to make it more social and interactive, I guess as I have no real idea why it was done, but in regards to KOTH, which hasn't had a HTC employee fly in it in quite some time, it does the complete opposite and hurts the social chatter. Used to have talks about hey that guy missing his elevator and still kicking butt!! Many other talks about what was going on, hey did you see him do that???? How the heck did he do that? Sometimes talks like that were teaching moments. People would explain the maneuver or offer to go to the TA or someplace and work with the person on it. That's gone.
New range channel has reduced the social interaction in KOTH more than 95%. And that's just my opinion on 95%, I have not studied it or have a pie chart, don't think Lusche or Snailman ever flew KOTH but maybe he did, it has reduced social interaction in KOTH a lot.