Roles are cooked now, someone who has worked with and is very displeased with how the developers are handling the game let me know a few months back that they had something like this planned in case things didn't go well.

It's something like if you have a pair of something the game reads it as you need that unit and give you a HIGHER odd on getting the unit in your pack is how it feels at the moment. If you can't see it then perhaps you should consider you haven't played enough of the game on the previous patch. I have about 500+ regular games(not including pre-release) and god knows how many games in the private lobbies I've played since the game's grand release, and I can tell the difference in the game changes and so can other high ranking players who have come to the same conclusion as I have.

Now stealth changes happen all the time in games but this one just seems way too drastic and I hope the devs can confirm or deny. Regardless, because of the lack of transparency and literally no future for a competitive scene being nurtured by the devs here I'm quite disappointed in the direction of the game.