For players who are new, rewards after game is a necessity in my opinion. I rather spend RP on a bitchin skin, not... a new champ, thats what IP(now BE) was for, and basically only for still apparently, only we get it at a crap-tastic rate.
Players who have all the champs, give us something truly worth sinking the BE excess into, and not just a hugely expensive limited time buy on an old skin or mastery tokens.
Idea for this excess: Extremely Exclusive(NOT LIMITED TIME) skins, unique emotes, unique icons. . . I already have too many rune-pages to ever require buying more.... decorum that you can use to alter the view of the rift. If I want a Candy Wonderland, well let me enjoy a walk on the Sponge Cake lane paths, the Chocolate Cookie Golem, the PeanutBrittleBeast, laugh as I use Nunu or Cho to nom on Chocolate Kiss Minions, or let me turn the Rift into an Ancient Primal Runeterra, or even a hyper sci-fi realm.
For New Players: Seriously this new system is actually screwing them over, compared to those who stuck it out since season 1.
BRING BACK REWARDS AFTER EACH GAME. They dont' even need to be big if you keep leveling in mind. 10-20BE after a match if you lose(based on Grades)
50-100BE for a win, again based on grade.