Chroma packs and mastery systems
Ok, lets get real, I'm a graphic designer and I know what chromas are, and so do the rest of you; they are RECOLORS, and even I could do 15 or 25 new chromas a day for LOL... the point is; they do not require that much effort, I would say that the heaviest part is to include them in the game; all of this is the reason why Heroes of the Storm GIFTS chromas to players, and ONLY chromas of the basic-classic hero/champ skin.
With the new mastery system and the new grade 6 wich takes time AND effort to upgrade we could be near a world as such, actually if Riot releases a grade 7 and releases a massive update with awesome Chromma packs it could be really really GREAT; because it means that the mastery system could gain real meaning instead of just using it to spam it during games.
So, to make a long story short; release a large Chroma Pack update, release grade 7, allow players to gain chromas with it.
PD: with the new release you should allow players to choose only 1 chroma to buy instead of a pack of three, same if they gain it with the mastery system.
PD: the Chromas for Garen suck so f*king hard
PD: Hi Meddler, grandma, mother, son, daughter, Meddler again, and the CIA, I know u are watching this.