For those in PVE and PVP who score above the max progression reward, there should be an ISO bonus to make it worthwhile. Otherwise, you’re just competing for placement rewards that you may or may not win, depending on your bracket and how many healthpacks and shields you want to use.
It would be nice to have more of a reason to keep playing, other than the chance to win some more 3* covers (I’ll never get top placement and win any 4* covers that way, so it’s not worth pretending that’s a reality for me).