I don't believe you are following my post, or you overlooked it. Key word is similar.
They already have a similar option in PCEA. They use it in Topgolf, which is in PCEA. Look at the top left hand corner of the PCEA screenshot image below.
The menu Chat Box I created as an example to WGT to add to the menu selections in PCEA. Large would be the current, and Small could be the same chat feature as in Topgolf. Seems like an easy fix since it already exist in the current game.
Maybe if I strike through the word -F-l-a-s-h- you will ignore it?
Obvious that the type of chat window is possible, could you give us a menu selection button? By default, leave it with the large overlay chat window to not affect the mobile and tablet users, but give us PC users a choice to have a similar -F-l-a-s-h- version chat box selection.
I believe the mobile version needs the large chat window, but the PC does not. Above I made a suggestion to make the large chat window the default so it works for mobile, but create a menu selection Chat Box Type for the large or small (same as playing Topgolf) chat type. And OBVIOUSLY Topgolf is not in -F-l-a-s-h-.