Actually, you need it the most. Nowadays you are around so you can take care of things here but when you are not here for months, who takes care of the community? These experts and editors will keep the motivation level high of these members. Moreover, by making anyone an editor does not mean he cannot help in development.
In simple terms, you need extra hands at development but don't know how to get those. In real world, a company pays and people work for that company. But in an open source script most people work for recognition and exposure. They do not need money, they just need exposure from this project. Now all you have to do is, encourage them, make best members into speical members, tell about these members to the community with an announcement. Show names of these members in a Team page listed on home website and tag them in social media posts. Basically, you need to give them incentives in an open source way.
Now what this results is in, more dedicated members who are ready to invest more time in Q2A. With more such special members comes more registered members who get better help in Q2A and also want to becomes like these special members. So they also start to invest more time here. With more members in Q2A, also comes third part devs (which are running away from Q2A right now) who see an opportunity to shine in this community.
If you don't think there is any need, then create that need by expanding work or roadmap. And then assigning that extra work to these new special members. That's how a project goes.
There are always people who work out of love for a project but more that 90% are there to find an opportunity. Give them some and take some out. ;)
Edit: As for the docs are concerned, you never asked anyone in the community to update those? Or asked what exactly they need in those docs which need to be updated. The more you get involved into community, the more the community get involved in you.