This is a braw idea I came up with:
Give post-match rewards based on the popularity of the hero you are using. Using the regular meta team won’t give you anything special but put Richter, Fischer or Halloway in the team for extra rewards!
I bet you (HHG) already have all the statistics on which heroes are the most and least popular ones in PVP.
This brawl would for sure be a stray from the regular PVP meta and who know, maybe it would also make people discover new team comps and ignite a spark for a previously unused hero?