That’s what we say the whole time
For me personally, the old -15/-30 was OK’ish in terms of trade off and by far not so much that you went too fast into war. I would say -20/-40 would also be OK. And especially in the beginning I highly doubt that you’re able to gain this back that quickly. Later on yes, but that’s why something suggest to make the loss dependant on the actual reputation, the higher you stand the more you lose.
Again, if you lose so much rep, that the faction rep went negative, then ANY heaven of this faction is negative so that you cannot trade or recruit with the whole faction. Of course there are two other factions
But that happens to me as I stole an early aircraft with the old rep values, and that’s why I decided to do that never again. Well, now this is no longer a problem, because they reduced the loss so much that it is no real trade off.
… and give you the possibility to refuel your aircraft at their base? Sounds even more irritating and not really realistic …