Champion mastery BE prices improvements

Am I the only one that finds it annoying that you have to pay 5400 BE to get a champion to mastery level 7? This is very inconvenient because you lose out on buying a new champion just so you can get a champion's mastery level higher. Back in the day it was super easy to get a champion's mastery leveled up because the currency you used to buy champs and to upgrade mastery levels were completely unrelated. I think the least Riot can do is to either drastically lower the BE costs ( I know they already did once but I think it was insignificant cause they still cost a lot ) to how they were before the IP/BE change (5oo for lvl 6 and 600 for lvl 7) or they can try and create a new currency just for champion mastery like when they had IP and BE system and perhaps you can obtain this new currency from Chests or maybe disenchanting mastery tokens etc... Furthermore, I also think that Riot should keep working on the champion mastery system, I personally think it's incomplete and that they can add much more stuff such as mastery lvl 8 maybe for getting s+ in a game with the specific champion... I don't have any further ideas right now but I think Riot can get by and find something original and that would please their players.