I get why birdring was let go, he just hasn't been consistent for the past two seasons (even though injury is partly to blame) and can get letting Guard go if they think they can potentially land someone better. I don't understand letting NUS go, however there is a lot in the skillset of main supports that we can't see. Perhaps his ult tracking or shot-calling isn't to the level that they would like it to be.

That being said, I think all three players will end up on new teams.