Eyyyyy, I knew if I just said random ideas, eventually one of 'em would stick! Glad I could help!
Yeah, the "pilots" sector would basically be another resource like the cores, so having them take very little juice would make sense. Maybe not even based on "# of pilots you own" but "# of pilots you're bringing into a mission", if that makes sense.
So, as I understand it: In the between-mission section, you can go into each sector, and look at the available recruits for that section. There, you can send them to transform into that sector's producer by spending juice up front, and/or a gradual juice drain while they're transforming. You can also do the same for fully-transformed producers to tier them up to the next transformation stage (assuming you're going with that idea). And you assign juice from your overall collected reserves to a sector also in that sector's menu. But, you can also press a button to spend juice to speed up TFs in that section? Or does that happen automatically via drawing juice from that location's juice reserve? Honestly, I think that the transform speed should solely be tied to the support division. It makes them feel less unique if you can do the same via spending juice. Also, that would allow for symmetry between the cores and juice, where support girls could increase TF speed and production in both. With a system as technical as this, having there be as much symmetry between areas as possible will make things easier and smoother to communicate, as well as just reducing confusion.
I'm totally alright with being credited, by the way. Thanks for asking!