What I know, is I tried to played Black Mage during season 1 and 2, and I stopped because of the chat.
I didn't even tried season 3.
With the removal of the chat, I came back and did season 4 entirely and finished top 100.

I know, sometimes real talk could help the team, but I have no faith in EU PVP community to hold his tongue and be capable to not injure/discourage/diminish other players.

The old chat don't need to come back, or if it come, add a report system too (like in Paragon).