Lets list all the things that might be terrible about the new ranked system.
I'll start off.
Dodging secondary/autofilled games before it doesn't hurt or main roles LP OR because the loss in LP is smaller than wasting 40 minutes getting LP for a role you don't give two shits about.
Trading in game with lower ELO people to a carry role to stomp. IE "Hey I'm plat 4 ADC, silver 3 adc swap with me for an easy carry." Plat 4 guy gets easy win splash LP, people that don't deserve a carry get one for free. This does bad things to MMR.
People that play Sup/Fill or Fill get dicked over and have to play 3-4x as many games to climb. Considering in the first couple seasons of this game required you to know 4 roles to get anywhere in ranked this is just a slap in the face to OG players.
40 fricken games just to finish placements. I mean there are people that don't play many more ranked games in a season. That's pretty redic. I mean considering champ select time, load time, queue time, dodges, and remakes that around 28-30 hours of gameplay JUST to place. Working peeps might get in 6 hours of play a week... Considering "most" of your games will be primary/secondary there are going to be people over half way through this season who haven't even finished their placements..... If this isn't even more of a reason to dodge autofill games I don't know what is.
Next.