Can we get a system introduced to help with wasted ip?

For example if i wanna play gnar. i can A. gain weeks on weeks on weeks to get him. or... i could... play a days worth of league earn 1000 ip at the min or about 2000 ip max a day play for 4-7 days and then permanently unlock them... and this is just to TEST https://i.imgsafe.org/80046c7.png so i spend all this time grinding just to test champs to see if i actually care about them.

if i like them because testing 10 champs a weak when the is like 140 is not a valid tactic i mean just rng wise that means it take 14 weeks to get every champ tested once and in 14 weeks the are 98 days so lets say you get 200 just from getting first thing of the day and you never got a lost so you never played 2 games a day that is still 19.600 ip i mean you can buy 3 expensive champs and have money left over. And lets be honest the return thing doesn't work most people refund ashe to try garen then garen to try nunu or something so they pretty much dont exist.

i mean heres my champs and ill cross out ones ill never play again and only really got to test or if its a high mastery rank but cheap like yi kayle or tryndamere i was only using them to grind lp to start with. https://i.imgsafe.org/c94f331.png

so most of the ip iv grinded for hours and hours was completely useless and now im saving up for gnar to see if i like him... like why cant i just buy a champion to try for a week? like a champion shard thing? (herp de derp gnar 1 week trial: 630 ip) herp de derp problem solve if i like gnar then i can use that week of playing gnar to unlock him and if i dont then i arnt wasting ip.

Plus i can understand why riot wont let us refund rp purchases because if you mess those up they made free money and hope your spend more but i dont think anyone who owns more then say 5 champs is temped to buy an ip boost to get gnar or illaoi faster (ps if you could look up the account called one crit man on euw and tell me what top laners you think i would like that be awesome)

I know this seems really ranty but its a horrible feeling going "oh iv spend 35 hours grinding for maokai" (play 5 games as maokai) "i fucking hate this champ" its so bloody horrible.