Don't you feel it's a little bit precipitated ?
I mean, Ranked 5v5 just went from "casual" to a complete bloodbath to competitive.
Some "decent" teams JUST have been created to get a ranking milestone to get rewards at the end of the season and then disbanded, aren't that synergized, or don't plan on playing more together for X reasons.
So we have about a month and an half to, for most of us, find 4 other potentially good teammates, practice like hell in normals, and then move to ranked 5v5 and hope to make it to the top ?
Only the first part can take weeks. I won't even talk of the others.
As someone who already tried multiple times to build a "competitive" team up, I think we have VERY little time for all of that, and that it doesn't reward everyone on the same level.
I'll explain that last point further :
Given two different teams, one is filled with platinum to diamond players that are quite over the top mechanically wise (obviously) but just made up to attempt the top 32, so the synergy isn't there yet, the trust isn't there either totally, etc.
The other team is made with silver to gold players, it's a very old team playing CASUALLY since then, filled with inreal friends, they have an awesome synergy, they trust each other alot, and love playing together. However, the mechanical side isn't much there. They are competent, but nowhere near the top.
So in the end, all their effort will be in vain, because you'll see tons of top solo queue players make a team on their own and crush these arguably better teams just because their mechanics are better.
A month and a half isn't enough to focus on mechanics, i'd give at very least double that time.
This comes from a platinum player.
You should have announced that with the Season 2 rewards announcement earlier in September.
TL;DR : All too precipitated.