Personally, I feel like the Army Swarmers complexity isn't going to be quite as offset as one might think. Really I think the biggest reason to make a Revision phase is just so we can work on improving the output speed of the Gates. Though we could also use a different Shift to create something that can be used to create Gate alternatives instead.
Other Shift ideas:
A fucking sun and moon(or an emulation of them) for day/night cycles, we're going to be pretty limited on what we can get from the Menagerie if we don't have those. I'd personally say it should be that the first half of a Battle Phase takes place under daylight, while the second half takes place under moonlight.
A way to create a persistent shelter for creatures we bring from the Menagerie, since we can't do that when the battlefield shifts every week. I'd recommend creating a decently sized "home base" for each faction, which remains consistent between battlefield shifts and would steadily change whenever a design that can theoretically contribute to it arrives.
Oh on the topic of the Messengers though: brilliant idea. Honestly, they even make it more viable to use non-sapient creatures in armies, since they can bypass the communication barrier with direct mind-to-mind instruction. I'm not sure on anything else though. Keep in mind Tric: I added the Elements, but there's not really any system of magic yet, nor is there necessarily any "elemental mana" or energy. I feel like we need to keep our applications of the elements more material in the short term.
Main design
Army Swarmer: (1) Jerick
Shieldbearers: ()
Flame Reaper: ()
Messengers: (1) Jerick
Mercenary Recruit
Support Unit ()
No requests yet (2): Jerick, Failbird