Maybe instead of asking for even 'more' rewards, you just accept that Ranked PVP isn't as enticing as people seem to want to believe that it is.
I don't think anyone wants more. Just to know what kind of rewards you can expect if you do arenas. Also increase insentives for arenas like daily/weekly or how ranked comms are earned.
You're 100% correct, ranked PvP is not enticing.