Idea for B.E mechanics

Would it be possible to allow us to go into B.E debt to purchase the champ we're trying to main instead of having to spend a week or more to grind it out? the new system is nice but it feels like it takes 2x the time to earn our B.E, missions help but if possible it would be a nice feature to allow us to go into a one time only ( until debt is paid ) any B.E earned after purchase strictly goes towards the debt and once debt is paid off you can purchase another champ, what do you think?

edit: maybe an option to convert ward skins,skins,emotes into B.E?