Preseason is like jury duty.
Every board post anymore seems to be nothing but a flood of people complaining about how broken Yasuo and Tryndamere are, how weak the towers are, how fast games are ending, etc. and etc.
You all seem to be missing the point of the preseason, balance. Contrary to popular belief the PBE isn't for balance changes, the number of players is just too small. The preseason is the time where Riot can throw in a bunch of changes at once and then fine tune them before the next ranked season starts. As such, expect some things to be broken and bugged, Riot needs time to tune and fix everything.
The preseason is like jury duty, everyone hates it, but it's an important part of the game and helps make things better.