I think 24 hours of offline progress is a bit too much, maybe make 6 by default and add upgrade for AI points?
I disagree, some people, like me, don´t have time to play every day, sometimes I am even serveral days offline, so 24h is great. I would even like some quest or synth or something, to be able to be able to collect offline time even more, or another mechanic/upgrades/synths/switches etc. where you can switch between idle/offline and active/online or idle/online, each having some advantages over others, just like we switch things around for all the different parts of the game.