Keeping Track of Average Level for Teams

I think with the new changes to minion pushing, Riot should have an easy way to compare your team's average level to the other team's average level, that way you can tell if that minion wave top lane is going to push toward you or away, as it could result in whether you participate in a teamfight or not. A simple number on the tab scoreboard would be nice, otherwise people will have to pull out their calculators .