If I'm remembering correctly, Mechanics has stated that they hit a snag with writing the Aeldmoot and all of the characters, so it could be that the next update is a pretty dialogue heavy one that's the source of a lot of headaches.
Writing believable dialogue can be pretty painful at times, writing believeable Warhammer dialogue is probably harder and writing believable Eldar dialogue could be more so, or they're making something involving the salvaging run on the wrecked Human ships, could be anything really (or they're just busy as someone else says lmao)
Either that, or Mechanis is still trying to figure out a name for our tank design and is drawing blanks

(Drake Tank maybe? Something to do with dragons? Hm.)
But yeah, looking forward to the next update.