I think Battuta's comment was responding to the hilariously out of context words:
"I'd say that its time to retire"
or they just went for the tl;dr.
I'm not going to leave JAD unfinished like that, so I'm not ready to give up yet.

I've still got campaigns planned after that too, so lets not get into hysterics.
And I didn't mean to come off completely doom and gloom, just opening a little reality of working in this niche market. Also it can be hard to be excited for new stuff coming out when you're apart of 4 high profile projects. I've been spoiled too much! Mjn, don't let me join BtA!
So I've released quite a number of things, how's my success been (judging by release thread activity)?
Shadows of Kraken: 25 replies
JAD1: 92 replies
JAD2: 92 replies
JAD3: 201 replies
Vassago's Dirge: 328 replies
JAD2.21: 78 replies
Looking at these numbers alone, I'd say that its time to retire.
It seems ludicrous that I spent over a year working on something that gets less response than the first two installments of JAD. But I know people really liked it, I know people played it. But I can't really tell how many people actually played it and liked it. For every reply, maybe there were 10 that liked it but didn't say anything. Or maybe 50. Or maybe just 1 extra. I can't tell. I tried to gauge better reactions with a poll, but interest died out on that pretty quickly as well, so I ended it well before I originally intended to.
And herein lies one of the biggest problems in motivating the community. There is no easy way to simply say you like a campaign unless you are a member of HLP. Perhaps we should just give up and add facebook like buttons. 
It's the same with Diaspora (although to a lesser degree). I get the feeling we were really loved on release but the Diaspora release thread has only 384 replies. So maybe you should use that as your comparison, Vassago's Dirge was almost as popular as Diaspora!
Hell, given that many of the posters on the release thread are one-time posters, it's probably more popular amongst HLP members!
Two and a half small counterpoints
First, Diaspora has an entire forum dedicated to it. Some well-wishers and other discussion won't end up in the main release forum, but in the threads around it. Vassago has all of its correspondence in the single thread.
Second, the point I was trying to make is more the contrast between the visible reactions from Vassago to JAD2.21. If you tried to plot out a graph of expected replies before JAD's release, you'd maybe expect it to go over, but it... didn't.
But that's not to say I'm disappointed with Vassago's release. I was utterly thrilled with it, getting very brief mentions on other websites with it even! (More a consequence of posting it on ModDB mind you!) It's just, you know, I wanted more of that warm baskingness.

This might just be a problem that I created myself. I try to bring unique missions and gameplay to the table, but its hard to know where the line between "this 5 minute mission is worth spending a month on" and "this 5 minute mission is not worth spending a month on". You can be sure any game developer would not like 5 minutes of gameplay taking a month to do, so I probably need to... not do that.
Oh come on, you know you love the challenge about as much as I do.
I do indeed love the challenge! But I spent a few weeks and around 200kb of a mission to something that the player can storm through in 10 seconds. There's got to be some limit where you need to go "hey, stop clowning around" and release
something this decade.
In any case, more random ideas to move to an upbeat tone:
Extend HLP to be a general space simmer modding community (grabbing ahold of old Freelancers, new Star Citizens etc). But extending out tends to not work out without a base ready to move. (But we've got a HW Mod, a Soase mod (maybe), a MechCommander mod so far...)
Create It/Play It Months
Months where we're all greatly encouraged to take a little time out and create a mission (maybe based on a common theme) or model (its Civ Transport month!) and just post
something at the end of the month, get a participation badge or something. Like the FREDding contest... just no eternal judging.
Likewise, a month where we're all greatly encouraged to play a campaign. Old, new, just something that's not yours. Maybe encourage posting LPs on places like youtube.
More FSWiki drives, these are great to get categories of pages up to date and looking great.