Would be nice, but wont happen probably.
Would be good for me because Im still getting champions with IP, and still want a few rune pages and runes of course.
I know youre not saying this, but here is what your request is coming across to the corporate mindset you are beseeching:
"Hey Riot, I know you sell IP boost and RP, and thats your income, but can you make less money so me and my friends can avoid buying IP boost and spending RP to purchase champs please? Thanks."
So while it would be nice, because it lowers the grind, a frustrating grind is how free 2 play games compel you to spend money.
I was personally unable to get my best gaming buddy to play League. He simply didnt want to waste time grinding up the levels just to be able to start learning the game. In an attempt to keep him interested I duo'd with him a bit, he liked Lux. Then after 3-4 matches (one of them they had to go mid vs a Yasuo, toxic champ contributes to driving new players from the game...) they were doing ok more or less. What they didnt want to do was spend a couple more weeks grinding to be allowed to fill up their rune slots and mastery trees, then MONTHS grinding to be able to have enough decent champs to actually play with. All of this, and they were too low a level to be allowed to use Flash...
Anyway, the grind sucks, but all Riot hears is "YES! He is getting his friends to play, and theyre frustrated at the grind... ITS ONLY A MATTER OF TIME TILL THEY BUY CHAMPS WITH $$$ HAHAHA!"