So as you might have gathered from the
UE Tactical Movement: Grid vs. Tape Measure discussion I just posted in the Ultimate Edition forum, we will be playing the initial 40K tutorials in
Cult Engine Zero (internal codename: Discord) but with visualization powered by Cult Engine 2.9 (internal codename: Tabletop Simulator) via a mostly top-down perspective.
Let's get the main issue out of the way first: Will this give us an ugly result?
I don't think so. In fact, I think the result is beautiful:

Yes, the perspective isn't 3D, but all the objects are, and I can occasionally post an isometric-ish screenshot so players can admire the battle in full 3D, especially in the larger battles where it's easier to take 3D pictures without showing the edge of the battlefield, thus ruining immersion.
Now, the players themselves won't be able to manipulate the camera, and though a music track will be provided for every battle, it's not the same as hearing it in-engine. These are obvious drawbacks.
But the upshot is that we'll be able to burn through dozens of missions in a fraction of the time it would have otherwise taken us, thus completing entire Warhammer seasons and catching up to the latest releases without sacrificing precious weekend time that should be reserved for the roleplaying campaigns. Tactics fans will be able to carry the entire Warhammer tactical metaverse in their pockets all day every day, and interact with it via Discord on their phones 24/7/365, working together with as many friends as they want to push back the "fog-of-war" of the overworld and unlock new locations, missions, modes, programmer minigames and of course lore in the form of books, comics, TV shows and more. And isn't this unheard-of tactical metaverse experience worth sacrificing some immersion for?
Moreover, keep in mind that the official missions ARE NOT the main dish in my tactical metaverse. The main dish are the Stronghold missions I am designing, which will be unique to my
Battlemaster, and where we'll HAVE to use
Cult Engine 3 because these locations have been built in this engine and look like this:



These are battles that will take a full day, or even multiple days, and they'll HAVE to be run on weekends. They'll be the biggest and most complex Warhammer battles ever fought, by far, in comparison to which the official missions will be mere training material to sharpen your skills and, if you do well in them, build up your army with free units.
So players who tackle the Stronghold locations WILL be fully immersed in 3D, with music, weather and spell effects, and so on, for hours a time. But these occasions will be rare so that they don't impede our roleplaying scheduling. They will be tough battles too with lots of calculations, so people will need a rest in between them anyway.
THEREFORE, by utilizing CEZ, CE2.9 AND CE3 to power different aspects of
Battlemaster, I manage to both achieve the ultimate in immersion in the Stronghold/CE3 battles AND the ultimate in metaverse gaming in the official/CEZ&2.9 missions.
There are many more benefits to this dual approach. For example, I can keep running the official missions even when camping with spotty internet connection, because I don't need to connect to a VTT or stream or anything like that. And if I give the Tabletop Simulator file to someone else, they can GM in my complete absence, but without fear of screwing up, since they can pause the game when any issue arises and just ping me or others for advice.
Finally, keep in mind that all this is merely the CURRENT implementation of
Alex Kierkegaard's Battlemaster in ALPHA form. There's no telling what the future will bring, and I personally fully expect to eventually switch completely over to CE3 and even
Cult Engine 4 before long, with ALL battles running with full automation on an always-on server, so that each player simply logs in, plays his turn, and logs off. We'll absolutely get there one day, but we have to start from somewhere, and I believe this hybrid approach that we're starting with is the optimal way to maximize the often conflicting immersion and metaverse requirements.
ALL THAT said, we still haven't run a single battle, so who knows how it will all pan out. So I reserve the right to make any changes I deem necessary at any time.
It'll probably work out fine tho.