Now that I think of it, Gearbox didn't use a new engine for Borderlands The PreSequel, due to a) Not enough money to budget both games with the new engine they're working on for Borderlands 3, and b) They didn't want to reveal the new engine, not until they release Borderlands 3. Maybe Riot's doing the same? They're overhauling in game aesthetics, HUD's and the like, maybe once they're done with the game they'll do a massive overhaul for the lore, and skin lore?
// Maybe. We know they’re actively working on a new client, but the thing people tend not to realize is that Riot is actually working on literally everything at the same time. So, they’re already working on lore events and new champions and stories and stuff as we speak, as well as a new client and all that. It takes time, but everything is constantly being worked on.
Though, if overhauls include Riven smiling like a giddy ditz, I’ll want to know why, and I probably won’t like the answer. XP