Features:

spectating possible! (not perfect yet)
balancing for 2, 3 or 4 teams
overriding teams manually
all information is available
sort, show, filter lobbies by title, maps or players inside
balance teams and paste it in game chat
select 1v1 / TG to show and balance, you can override Elo manually or estimate the "true" Elo.
join to selected lobby/match in game by clicking on it (also fixed for Linux if the configuration supports)
instant load of the specific lobby by ID or by player's name
improved GUI
fixed some flaws

Bugs:

can't always load all the ongoing matches due to a bug in the Godot itself. But incremental loading is working.
let me know if you encounter any crashes / bugs