Make Recall VFX permanent and buyable.
After seeing the recall VFX on Nexus.B, with the sounds and visuals; this was both nice to see combined with certain skins' recalls and didn't obscure or affect the game.
I especially liked it on Firecracker Jinx, changing Jinx's lackluster roman candle into a sky full of beautiful fireworks! But maybe recall VFX could work out like how emotes do, something to equip before the game.
Along with this, it can sky-rocket game clarity for those without skins with different recalls. ( Honestly, seeing Imperial Lux recall is like seeing her use Teleport. )
There's absolutely no reason it couldn't be implemented in normal play. The visuals are extremely nice, and everyone likes having another way to make a skin feel like their skin.