Except for once again you're guaranteeing 8 minute matches.
He is a counter to nothing, two people to roll RPS on port 3 to make him a useless stock tank while you 0-death his partner.
I appreciate that you love the game, but you aren't helping it any by using him in tournament. He's a gimmick at most, a useless annoyance past that.
[edit]
I juss thought of something
What if when, in teams, you steal a stock, you take that persons % and everything, and they go to 0 but lose the stock, meanwhile you come down with their old stock, at the same %.