I think the stats that are listed already: rating, record, timeout percent, time per move are rather sufficient to decide whether to accept their seek but I would not be surprised if the Chess.com staff had it added to the seeks within the next 5 minutes!
Also, if you just click their name then it will bring you right to the page to see their average opponents.
Could the average opponent stat be added to the stats shown when you click on an open seek? It would help in determining whether to take the game.