Sorry to ruin your hope: The devs dont really respons much.
People like to exaggerate. I think most updates are fine and really a step forward. I really love some of the QoL features in the recent patch.
Main issue in the recent patch is indeed the lag in late game in team games. The devs are already aware of this issue and working on a fix.
After they fix this issue, i think we can look back on a great patch. The only issue left is the new UI which is also slow. But that isnt is nothing compared to the lag.
3 hours doesnt sound that much to me…
Note: Dont understand me wrong. I really understand the frustration. I also have no answer on the questions: Why didnt the testing team spot this issue? Those questions are legit and i also hoped for a patch without those issues. I also wont be against some sort of beta. That can be useful.