Adding stats to each hero is very productive for the gaming
Like how many kills and how many time died in batlle
And how many wins and so on for each hero
And little tweek to pvp
Just add how many wins and loses to each player in the pvp
In the end link those stats to new achievments and add simple rewards for it
I suggested this in an earlier post a few weeks ago. Rook, one of the developers, answered the post and said that this is either in the works or on the list for a future update.