The only active developer is me. (although im not very active myself due to other projects and real life)
Radiant and Againaway who are the other developers have either moved on or are too busy right now.
I cannot however reproduce your port issue. I can connect just fine on port 8067 and i cannot find anything in the code which would cause any problems with that specific port either.
As for the big problems, i cannot remember having heard of them, so i can't really comment. Regardless, we, the developers have been running 3.0 for litherally years now, and since 3.0 release, any development aside from bugfixes and security fixes for the 2.8 branch seized.