Yes, Marksmen are supposed to be important, but they are not supposed to outclass every other damage class in literally everything.
How long until RIOT finaly wakes up and admits that the ADC itemisation is broken for ranged DPS Champions?
Just take a look at Tristanas dmg in the Game FB vs HKA:
3 Autoattacks, 3 hits for over 600 dmg each...
How long until RIOT finaly sees that critical strike is a freaking broken stat for ranged carries and has to be changed?