My issue with labs is not actually the space premium. You're right that an R&D base is the least space-intensive of all base types besides an interception outpost.
The trouble I have with the current system is that I can no longer
specialise. Increasing research capacity is a matter of sprinkling labs all over, not building one big research mega-base. I am also largely forced to build up a base's research capacity over time, as new facilities become available, not all at once when I want to and have built up the funds for it.
With advanced hangars available, it makes sense to leave only one hangar on the research base, which eliminates those extra 5 spaces.
Advanced hangars are officially a thing now? Where? How?
What's the fifth space, BTW?
A recent play experience suggests that 10 spaces is actually adequate...
Um, I tend to need more than that for a research base. Or is it purely research facilities?
Let me see... A research base ought to have HQ, Intel, Bio, Standard, Improved and Advanced Labs. For convenience, also a Psi Lab and 3-4 prisons (ghosts can likely be omitted), and a Lunar Control. A
base needs general stores, at least two living quarters (and probably three, for the garrison), one hangar, one radar/HWD, access lift. Gym and Sick Bay for training and transformations.
Maybe a Workshop as well.
That's about 20-24, all told. You can probably make do with HQ, Standard, Improved and Advanced Labs, one prison of the type you're docusing on, stores, 2 living quarters, a radar and a hangar. Plus the lift. That's still 13. What are you omitting, stores, HQ, prison?