So 10 AIP doesn't matter (much) to you? For reference, how common is it for you to feel that you're actually in danger of losing the game once you're in the mid/late-game phase?
I get that feeling every exo-wave, especially when it coincides with a regular wave or a CPA. If not in danger of losing, i feel in very high danger of irreversibly losing adv fabs (i try my best to defend these, but they arent high priority), adv facs (second priority, first being home).
The part about evaluating how well you can defend each of those, and then seeing how it really works out is what's most fun.
How many AIP does it take to matter to you?
+5 on a fab would make me ignore the most useless or the least defensible ones. +10 would make me rebuild only the most valuable or defensible ones.
I would easily accept 20 AIP for adv fac. Thats just 1 planet, and i get 2+ full caps of MKIV ships. Remind me, how much a neinzul enclave MKIV cost in Knowledge?
At 30-40 AIP i would still rebuild it, but be VERY bitter about its loss. 50-60 and i'd only rebuild it in a large game where i have 5+ MKIII fleetships unlocked.
For the fabs, I went with a low number for the individual fab, but if you have 4 fabs you want to keep running and you lose each of them 4 times over the course of the rest of the game...
It is not very likely you will lose all 4 of them, moreso multiple times. You can expect 1-2 to be in the "not worth rebuilding, will die again" zone, and 1-2 more in the "Deep core" zone where they are extremely unlikely to die.
This suggestion is generally for the people who like easier games, and in those, such AIP values wouldnt matter all that much. I mean, we arent balancing this specific change around 9+ difficulties, right?