Please create a thread in Dev Corner dedicated to [QoL] suggestions entirely.
A lot of Quality of Life threads are being made on this board these days and most of them just go unnoticed by Riot, despite the possible positive impact they might have on the game. I believe, everyone will agree with me, that we can't possibly have too much QoL in LoL. QoL changes, while usually being little, are that thing that makes one of the biggest overall satisfaction increase among players.
Some QoL examples from my previous threads: http://boards.na.leagueoflegends.com/en/c/gameplay-balance/QnLwenHE-custom-champion-groups-in-champion-select (custom champion groups in champion select)
http://boards.na.leagueoflegends.com/en/c/gameplay-balance/1UVIgtAX-riot-daily-reminder-bandit-mastery (bandit mastery must show the gold it helped to gain after the game)
http://boards.na.leagueoflegends.com/en/c/gameplay-balance/52cYTx2a-clarity-damage-dealt (timed after-game damage dealt stats)
http://boards.na.leagueoflegends.com/en/c/gameplay-balance/9mka1kfP-qol-default-purchase-item-slot-priority (change item slots placement priority)
http://boards.na.leagueoflegends.com/en/c/gameplay-balance/pO8BZekE-important-qol-penetration-clarity (show enemy's armor/mr stats modified by your penetration amount)
http://boards.na.leagueoflegends.com/en/c/gameplay-balance/KTE2viPL-death-recap (death recap currently shows 3 enemies, while there are 5 enemies in SR/Domi/ARAM)
http://boards.na.leagueoflegends.com/en/c/miscellaneous/3Kq8m5qc-rito-pls (buying elixir while dead) (did you actually listen that time?)
http://boards.na.leagueoflegends.com/en/c/miscellaneous/iLIElANE-pvpnet-ping-check-feature-please (check your ping in PVP.Net)
http://boards.na.leagueoflegends.com/en/c/miscellaneous/Wsv3Lqzb-qol-favorite-game-mode (1 click play favorite mode)