Yeah, a possibility for typing a reason for the vote-kick would be necessary as well. Besides, it kinda reminds me of the kick system in V7.
Another idea which I thought about by reading your reply is to add a small sticker on one of the sides of the screen which fully shows the vote-kick for those who couldn't see the message popping up on time at the bottom of the screen, and thus, they will be able to spot the reason for the kick and vote accordingly.