Things that would make the game more enjoyable and bring you new players and back old ones.

Adding new jungle items effects like in past seasons

Improving turret's damage

creating custom 5v5 skins for maps that would cost you RP (the skin selected would be chosen randomly or it would only appear on the screen of the user to make a better rentability of the skins).

Reworking summoner's spells and adding new ones, for example letting us use the mark in 5v5.

making a 5v5 classic game mode. you would have the meta 5v5 which would be the ranked one/Esports one and the 5v5 classic a game to chill and have fun. the difference with this game mode is that it would be based on season 5 meta without the ardent censer being op. turrets would be stronger and games would last longer.

adding enchants : 2 ways to get those enchants : being far behing would give you access temporarily to some enchants. (example double the gold from cs or the exp for a short amount of time) : being full build would allow you to purchase late game enchants.

Adding the possibility to upgrade a pink ward that would have true vision . The upgrade would have a cd.