As far as I know uTTT was not invented by aigames, so it doesn't really matter if it's a copy or not, just like it doesn't matter for Tron.
I think the biggest issue is, from my understanding, the ranking system throws away draws instead of feeding them to TrueSkill, which makes proper ranking difficult in draw-heavy games.
I also think it's the only reason a draw-heavy game can be considered an issue at all, as it can naturally happen a lot with more 'classic' games like this or chess. I would much rather fix the ranking than try to add an arbitrary rule to an already well-established game (imagine changing chess to deal with draws), with little knowledge of the impact it will have on the game balance.
That being said, I don't have any idea for better 'rules' at the moment, and my experience with the game is very limited (I started my bot barely a day ago), so I would trust Daporan's experience with the game if he thinks the new rule isn't good. Maybe we can also conduct further experiment with variants in a demo playground before bringing it to the official game?