What Exactly is the Point of Diminishing Returns on Level Up?

I see no good reason for leveling up to take more exp each level, but BE gain to have the same range each level. The worst part is that BE gain is solely from shards and the occasional mission, and as shards are random it's quite possible you'll get a pittance for a level, despite the fact that you're putting in progressively more work for your BE the more you play the game. This seems like a quite backwards rewards system, especially considering that if you play a lot you're probably also buying more new champions, and as new champions are released(and rather quickly at that) more Blue Essence is needed, but more work is needed to get the same BE. A better solution seems to be: Each level gives be scaling with your level(maybe it increases by 500 every 10 levels, or something, base of 500-1000). Make champion shards work somewhere between key fragments and skin shards. They wouldn't be champion-specific, and you can use one to rent a champion of your choice for x amount of time or y amount of games, or use 3 to buy a champion of your choice. Increasing mastery level to 6 or 7 should not take BE. There's no point to this. It's meant to be an expression of player skill, but personally I'd rather buy a champion that I can actually play then spend 2450 BE to get a flair I've literally already earned. All it shows is that people at m6 and m7 have nothing to spend BE on, or have a very specific champion pool. In conclusion: There's no reason Riot should punish their playerbase for spending more time on the game. Either detach the BE system from levels(IP is a more player-friendly system by far) or have BE gain increase with level. If we're doing more work for our BE we should be getting more out of it, not working more to get nothing.