Yes, lets remove a feature designed to secure kills in a mode with a spammable heal button.

Removing stuns would lead to securing kills becoming a chore, or we remove recup as well and everyone just blows up and the entire mode just turns into chaos with no real thought process.

Server tick rate issues aside, the entire point of CC is to force players to utilize their CD's wisely and to pay attention to their positioning on the map. If you dive into a pile and then mindless burn your purify then that is on you. Play smarter and stuns become less of an issue.

Side note:
If you're referring to FL... I do not care. For the 1 millionth time, asking for a mode with 72 players to have any semblance of balance is just stupid.