It seems the main reason to add this back is so players who get cant connect to server can use this to connect in some way?

Yes, having the button hidden makes it impossible to try and join the server from the main menu if its not your last played (you have to have been in the server for dayz to think its ur last played, queuing into it isnt enough) Custom main menus almost never work. I hope you can make yours work.

Never had these issues myself, but I will look into it regardless. And if adding the server browser helps then Ill consider adding it back for next big update for sure. Thank you for posting it as a suggestion.