I think they should put a me3 style loot system in place so instead of earing random rewards you instead get currency based on score in match and then you can use that currency back at tower to open a loot chest which then gives out the random reward. This way good players will have more opportunities to open it and bad players who stick out matches to the end will still be able to save over enough time to open it. The best bit tho is afk people get nothing. Also stops the envy rage of seeing someone else get something at the end of match.