The same experiences as you did I also made, I'm not at all satisfied with the situation.
I lack a reasonable solution for multiple domains or multiple email accesses, that was possible in the old SOGo version now no longer.
The current WepTop version (4) is no alternative, there are too many features and the future the allegedly that has everything there is no demo or similar in the net.
Very unfortunate - reminiscent of mystery.
Thus I will have to stay with all restrictions with SOGo 3.2.6.
Oh yes the 3.2.6 reacts emotionally somewhat brighter, but not much ;-(