Because 40m across is already a small vessel?
I don't have any hard numbers to work with, but from what I recall the Carrier was originally mocked up as being the biggest of the capital ships. Let's increase the width to 400m: the ship now only has to be rolling once every ten seconds. Add in a second axis, and even if the hangar is not offset from the second axis, we now only have to be moving around each axis once per 14 seconds. Let's offset the hangar by another 400m to the side, bringing the effective distance to 564m, and now I only have to be revolving once every 20 seconds.
And that was for 227 kph movement perpendicular to the desired angle of approach (assuming craft fly into and out of the ship at right angles to the carrier) with a rotational factor not even being accounted for.
Of course, I was presenting a situation where small craft would be incapable of landing even with computer assistance as a way of demonstrating how I (and I assume most people here) are not asking for a scripted landing scene. The situation was intentionally absurd, not because I expect it to never happen (somebody, somewhere, and probably more often than will be desired, will spin up a carrier to such speeds for the reason of "because they can") but because I wanted an example.
That being said, you want slow carriers, but then want them to shuttle goods, and reference helicopters in ARMA 3. Shuttling things back and forth in ARMA 3 is not a slow, show-up-and-sit-still for hours role. I'm not even sure you yourself understand what you want a carrier to do: you first say they just need to show up, negate movement, and drift. Then when asked how that could possibly be exciting, you come back and say they should shuttle things around, not act as a spawn point, and have a generally "active shuttle" role.
I'm cool with either design, really. Slow-moving "forward camps" that get delivered and left unmanned as a spawn point, or fast-moving "shuttles" that have insane warp speeds to get back and forth from spawn point to battle to spawn point to battle ad nauseum. But you have to pick one or the other.