In a war setting, in SQ42 for example, there could be a use case for ground based support vehicles like this, for example if the area has really heavy enemy AA, which would make it too risky to constantly send medevac ships in and out.
Still with the ability of even large ships to basically just hover and follow the terrain, it would be hard to justify a big blocky target like this, unless fuel for the ships becomes an issue but not for the ground vehicle.
I like the overall idea of having a larger ground based healing unit, but...
I think it should not be mobile while in "healing mode" . It should be a medical tent truck type of deal, where it can unpack itself into a field hospital, and pack up when needed, with like 6 beds that can be stowed in transport mode while still having someone in them. But you should not be able to perform any serious healing on them until unpacked. Transportation of wounded to the unit could be handled by 1-2 small hover bikes (dragonflies or such) that comes pre packaged with the vehicle. This would provide easy access for fast fun gameloops, where some can go out to grab the casualties while the others prep to heal them. This way it's a whole package deal of gameplay loops, not just a vehicle that still needs others to buy and turn up with other vehicles.
The whole thing should fit into a Herc. It could be used as part of invasion fleets, and could serve the civ market as a hospital for orgs while they construct their homesteads on inhospitable planets or for the wealthier larger pirate orgs that are constantly on the move but require these facilites at their home base wherever that may be. It should be a deployable vehicle that is not bound to the owner bing online so it could remain in place.
Anyways, I've gone waaay off course into fantasy land with this one. With the current gameplay it's kinda pointless.
And although this vid was recommended to me by YouTube every single day, I still haven't watched it lol