This is actually a clever idea, and also if you're playing Breeze there's that treacherous creeper face in the wall that forces you to be very careful when chasing a nooblet up there, but with this idea you could be on some other map and then you can win easier. But the only problem is, there can be that rare case when the same map is on Deathmatch. But another thing is, people would only see the cornucopia of that ma[, and won't really give much of a look. But I guess it lets people know that map exists. Another way for this is a new deathmatch arena overall, that gives people a good chance to win.
I can see ChadtheDJ announcing it...
New Deathmatch arena, win and you get the satisfaction of knowing the arena so you can beat someone with a Bruce Almighty stick first game you play.
But only problem with THAT is that there can be lag when it comes to teleporting people to another world, which is why they removed the former Deathmatch arena (The one with the sand and lava)
So technically keeping this Deathmatch would be okay, it's just every other suggestion has it's cons. ( Bad things)
Oh wow, I almost made a G33ke post. Yay me.