Have you considered adding voice acting? Surely the great work needs to come with voice acting

I'm sure there is plenty of us who would be happy to help with that.
None.
That would take forever and a day, and besides, would require dozens of different characters voiced, many of whom are female which poses an extra challenge. Even through the use of TTS systems, it would still be a monumental undertaking. Bear in mind that the canon characters would also have to be re-voiced down to the units, because all of them have non-canon speech, and I could not afford to have their unit responses and the in-game transmissions to be made in different voice, could I?
Anyway, I resolved that I would not predicate the campaign's release on this, but would look out for the possibility to add something later as patches/updates.
Trial and error... mostly error.
Video walkthrough of the penultimate map, by Alex.
http://www.staredit.net/378523/Actually it's the very last mission of the campaign but there is one more that needs to be created. Then, it will be release time!
Trial and error... mostly error.
The final map (3-6) is started and almost half of the terrain was done in one day (Dec. 25th). Hopefully I'll be able to continue soon.
Trial and error... mostly error.
The (last) map is progressing, though still mostly in the terrain phase;
Auras now finally have visual effects, praise Neiv;
Optimizations are being added along the way;
All in all we're looking good.
Trial and error... mostly error.
The last map is mostly finished, but I'm having problems with the AI Scripts for a change. Will be solving it shortly, hopefully.
Trial and error... mostly error.
The script issue has been solved, the last map is in the "polishing" phase. Then, on to optimizing and retesting the whole campaign, and it'll be release time.
Trial and error... mostly error.
A new system has been added: pointing your allied AI to their attack destination with a button in a special building. Was pretty fun to make although it isn't easily scalable and requires some expenditure of locations (as well as large amounts of iscript code).
Trial and error... mostly error.
Test of the last map by Alex is here!
http://www.staredit.net/378597/There's some explanaiton about that mission in the thread.
Release is imminent.
Trial and error... mostly error.
Alright... I'm posting updates almost daily in Discord, but for those who are not paying attention there.
The testing / polishing phase is in full swing. I've spent days working on the most complex and trigger-heavy map of the campaign, 2-1, and hopefully I've finished editing it, unless someone finds a bug. But I've solved the long-standing issue with some effect timers in iscript being wonky, which has been plaguing the map for an effin' YEAR, give or take. Besides, my attempts at "optimizing" iscript in early January left some mechanics broken for reasons I was unable to understand, so it took... quite a bit of time to fix everything.
I'm continuing and hopefully will finish soon. The two most complex maps are back to back - 2-1 and 2-2 - but I've already taken the (similarly lengthy) look at 2-2, although one final retest wouldn't hurt.

I really want this to turn out as awesome as I can. Of course not "best campaign ever" awesome, but hopefully as close to that as possible.

Man... Humility is not my strong suit, innit.
Trial and error... mostly error.
Map 2-1, "Forging the Sword", has been submitted to this year's Maporino contest. It has not been showcased yet but it can be downloaded.
See the Jayburrito discord:
https://discord.gg/RHrpQKaqSpeaking of the campaign itself, I'm still testing / editing and I'm feeling like it's taking forever.
Trial and error... mostly error.
Map 2-1 was showcased on Maporino with good results (as in, Jayborino has finished it, unlike the submissions from the previous two years).
I'm trying up the loose ends and very much hoping for release sometime later in May (this year, of course

)
I've also returned to the process of translating maps in arc 2, now working on 2-2.
Trial and error... mostly error.