To anyone who thinks this game will be balanced when 8.1 drops, remember every other season
5.1: Vi, Jarvan, Lee Sin, and Rek'Sai were basically the only viable junglers. Jarvan got nerfed 3 patches later, reducing the number of meta junglers to 3. 6.1: Was basically ADCs in every lane all the time. ADCs were relevant at every stage, having strong early, mid, AND lategames. 7.1: Camile, Leblanc, and Rengar were on permaban status.
I wasn't around for previous preseasons, but I doubt they were any better. We'll probably get around 5 or 6 patches in before the game is actually balanced, then Riot will knock everything on its head again with midseason changes or a major class update.