Because i am uploaded this campaign on Knossos and fixed the Phonecia spelling error on this way. (and added the Phoencia nameplate also) i played through it too, in this process.
Well it is hardly believeable that a whole HoL destroyer can hid itself for nearly 20 years (since Operation Templar at least) but nonetheless i liked this mini story. Nothing spectacular, but not bad either.
I actually do not think, that the missions are too short in any way. Also i actually had the most problems in the second mission
Actually i had no problems with the difficulty in this campaign either. Even on Insane. But actually i had more problems in the second instead of the other missions. Actually i did not have much problems in the last mission with the Beam cannon and the comm system thanks to Maxim and/or Trebuchets you can use in this mission.
Even i had to say, that the bad end is much more interesting in this campaign than the good one

. That bad end reminded me much of Deep Blood 2... unfortunately with the same cliffhanger without any continuation.
But as i said before, a good small campaign i can recommend to every player who is especially short on time.