@Riot Flash needs to be removed
Unpopular opinion I know, but flash should NOT have been allowed to stay for as long as it has. Give me any other item, champion, or summoner spell that sees 100% play rate that DOESN'T get immediately nerfed into the ground. Remember when teleport had a decreased CD when TP'ing to allied towers? And riot nerfed THAT into the ground....why? because they were seeing 10 teleports a game...but seeing 10 flashes a game is supposed to be the norm? Remember when Riot ADDED a second summoner spell slot because the single one was ALWAYS being used for flash? Didn't Riot think for a second "Wait, if everyone is willing to trade EVERY other summoner spell for this ONE than maybe we need to balance it?"
Actually when you look at it, when the exception of some number changes Riot has completely abandoned summoner spells. There used to be mastery points (R.I.P.) that actually interacted with summoner spells and could make them something special. What do we have now? the protoflash rune....a rune for an ability that we already see 10 of in every match and is frankly useless except for trolls and goofing around. We used to have a spell that granted vision, a spell that refilled our mana, a spell that boosted our turrets or nerfed the enemies! Revive used to be a spell!
Does Riot really want us to believe that they can come up with Aphelios and somehow be incapable of thinking of a new summoner spell? Guess what the last summoner spell was? Mark/Dash....exclusive to aram...and THAT spell was just a copy of a spell used in the limited time Poro king gamemode...and THAT spell is just a copy of Lee Sin's Q?
The last REAL love we got for a summoner spell was the smite rework and that was...season 5? Granted, it was cool but it only affected one player on a team, as any team that wants to be competitive takes one smite. We need more summoner spells, and flash needs to be nerfed or changed so that not everyone uses them. What if Riot gave ghost the same treatment as Smite? Have items that interact with Ghost in a unique way. Maybe have an item that ghosts your nearby allies when you burn it. Another that gives you tenacity while ghosting, another that changes ghost to an Attack speed buff instead of a movespeed buff. That just the ideas for ONE spell that already exists....come on riot I know you are better.
TL;DR : Everyone has gotten so used to seeing 10 flashes a game that no one realizes how silly it is. It needs to be nerfed or removed, and we need more/new summoner spells and some love for our less popular existing one. Also bringing back some of the ones they have taken from us would be nice