The resource requirements could be worked around for that if one used the experimental low powered mode in msfs 2020, there the hangar is not everpresent in the menu backgrounds but a blurred out static screenshot of it serves as the menu background. But the hangar was still accessible if one wanted, but now it’s truly gone in 2024.
About the size and fit, yes I agree that could have been improved, but compared to your suggestion of a turntable where the aircraft sit, I think the hangar is far better. I feel the hangar grounds the plane is a more relatable environment. Cars on the other hand are fine on a turn table.
And in any case the current aircraft / variant / livery selection UI is just awful. And I thought 2020s plane selection UI was bad, well atleast it was quite functional. The only thing it required in my opinion was a favourites list which is still missing in 2024 and a variants page may be (bad implementation, again, in my opinion, available in 2024).