I just uploaded a game that I was messing around with to remember points for a review I'm writing.
In it, I've literally JUST sued for peace with the Phidi and used 100 influence to do so, only for them to declare war on me the VERY NEXT TURN.
There needs to be a cooldown, or something like that, with a peace request.
I really like a lot of what SiS does, but the diplomacy - something that is integral to the 4X experience - feels borderline broken.