Currently some penalties for switching between categories leave room for exploit if switching to higher hurry cost category.
Such switching should be adjusted to avoid exploits even at the cost of losing extra minerals.
Example,
Retool exempt minerals are not penalized between facility -> project switching. They could be bought at facility hurry cost thus saving on higher project hurry cost. So they should be penalized also for such switch in proportion that does not allow any exploit.
Currently some penalties for switching between categories leave room for exploit if switching to higher hurry cost category. Such switching should be adjusted to avoid exploits even at the cost of losing extra minerals.
Example, Retool exempt minerals are not penalized between facility -> project switching. They could be bought at facility hurry cost thus saving on higher project hurry cost. So they should be penalized also for such switch in proportion that does not allow any exploit.