A few things that I think many would find helpful would be a ranking bell curve. It would allow players to see where they sit with respect to the masses.

I'm currently at 277 rating but I look at the lb and see 350 while I usually get matched with less than 200 rating opponents. While I don't think rating is that important it be a nice feature.

I also think I'd be nice to see some game stats like win/loss ratios for going first or second. and percentage of heroes used, though this might be difficult but it were based on perhaps the last 1000 games or so I would give generalized breakdown.

Sorry if these have been posted before, I remember seeing a few of them come up but in different sections of the forum.