Agreed on focussing on 1vs1 for now.

I don't like the idea of having to wait for your partner to be defeated before you get to play though (prefer the simultaneous, side-by-side idea).

And there's many different ways to do it too.
Is it teams of the same level? Because finding, for example, 4 lvl 40 fighters is going to take a while.
Or teams of same average level? Because 1 team of lvl 10 and lvl 50, vs a team of 2 lvl 30s might give one side a large advantage.