The obvious changes to League that Riot should already be working on. Updated frequently.

Here are some suggestions that I think most players would agree with. They are changes that I believe could improve player skill, bring game balance, and increase overall game experience.

1. Update the champion information on each champion to include champion stats and ability stats. Maybe even add suggested builds or counter picks. This is most of the information players go to other Apps for anyway.
2. Balance the summoner spells. I wont give my two cents on how but they should be balanced to increase variability in games and when choosing champions.
3. Increase the free to play champion count to 20. You have so many champions as it is, why not give players more options to test more champions. consider increasing the sales on champs and skins too.
4. Add solo que to 3v3 rank but don't allow duo. encourage players to utilize all that LOL has to offer.
5. When logging out of the game there should be an option for exiting the entire game and a second option for only "logging out" taking you back to the Log in screen. Seems logical to me.
6. Add 1v1/2v2 mode (showdown) at all times. Players are always creating 1v1 customs anyway, might as well help them fill that desire.
7. Sandbox mode that allows players to try different builds without needing to invest hours in custom.
8. Hard/advanced bots. I recognize that its not that easy to do but I know players still want it.
9. Training/test mode, allows players to test out any champion and learn the basic combos and play styles of that champion by going through commands and tips the pros would use.
10. Add a "death recap" option/change the current one. Often times there is too much going on in a team fight to really understand how you died. A death recap will help players improve before their next fight. The current one doesn't tell enough.
11. The ability to Replay a game to learn from your mistakes.
12. An auto-pilot home button for those pesky emergencies that you need to leave the computer immediately for. Or if you have a terrible lag spike and don't want to get killed for it. Champions would take the fastest route home and use any dashes/movement abilities to get there. (maybe)
13. A loading indication when starting a game to identify whether you have crashed or not.
14. Summoner Name change and one Champion refund should be allowed once a year. People's likes/dislikes change.

I will add more suggestions as I think of them but I am only listing the obvious ones that the general population would agree with. What suggestions do you have?