After you update your game to the latest version you'll see some new things in the Multiplayer tab. I added 4 Quick Join buttons, one for every official multiplayer game mode. This is intended mostly for people that don't wanna use the server browser or don't know how.
The quick join prefers low ping, non-empty but less than 12 people, building time servers.
More patches and customizable quick join is coming, have fun!
MM
Other changes in this hotfix:
[added] materials decay much faster on crowded servers
[modified] closing servers browser brings you back to multiplayer tab
[fixed] custom heads in singleplayer
[added] spawn mats in sandbox
[modified] chat and scoreboard colors to less eye bleeding
[fixed] kill feed being very long (sometimes)