Brew pvp is a causal lolz thing only. Sure you can kick a person off that map but in rated bgs the walls on rated maps stop them from falling off, so your one good move is actually worthless in rated.
In the end its your $15/month so if you can find a team to take you then go for it. But most teams will say their collective $135/month means they are taking a meta pvp tank and not a gimped brew.