Is it time to captcha 3v3's? YES
So I like treeline. I do! I enjoy a good 3v3 even if I kind of suck at it, forgivable sins considering NOBODY goes to treeline, not really.
The entire time I have been playing league of legends, treeline has been the only part of the game I've found to be totally and completely overrun by BOTS! Mindless leveling macros that walk champions up to towers spamming abilities in the hopes that more bots are playing on the other team and they can get their saleable account it's win of the day and level progression. This has always been a problem, and unless something is finally done about it, it will always be a problem, and while I'm sure Riot is aware of it, after all it's been a problem for a long LONG time now, nothing has been done in YEARS of it being a problem
Solution: A captcha. Bots don't solve em, you have a bot problem, and I'd rather it take ten more seconds to queue treeline than it take fifteen minutes to try to "honestly" play for a loss with a team of mindless leveling bots, and while I am fully aware of your hextech aesthetic and how the new client needs every bit and bob to look like something built to run on a dwarven iphone, I stand by the idea that I would rather a piece of software be ugly and function than be pretty and useless. Please do this, or something like this!