I’m probably going to come off as an elitist jerk right now, but I believe this ties into the whole discussion here. You and your team leaving is not something I’d consider to be a sign of a declining community here. I am very supportive of the “UE4 is NOT for everyone” mindset. I personally embrace the fact that it has a higher learning curve and bigger initial hurdles. No matter how welcoming a community might be, seeing a million beginner posts that have been answered time an time again flooding the forum and AH does not help keep the more dedicated veteran members around. I would be delighted if this could boil down to a small, tightly-knit community of regulars, with Epic taking a more active participation in the forums.
That being said, I am of course aware that new members are needed to keep the community alive, but a conscious effort needs to be made to educate people and to have resources available that new users can peruse. AH is the number one reason that new people have a hard time, as they expect to get help on AH which never comes.