This is the point

I meanit seems like you're gonna need to EVE Echoes ISK fight them where they are to defend your system. You want to defend your own body more easily as compared to people having the ability to travel more freely. In a mobile game, it feels like journey would be more important than allowing groups of gamers to block off large parts of the map so only they can play there.

200 cruisers come to your home system and take off your structure - that's fine. You set up a timer for repair and also form a fleet for a fight next time. No gatecamping necessary for that.

Regrettably this stage is overlooked and its really a single problem unfortunately. Afk in low sec does not matter imo. Allowing that in null long term would destroy sov/econ equilibrium. I also dont know the expectation of having any security at all in a region named"null security". Of all of the ways they could have described regions in EveBuy EVE Mobile ISK, the one that they believed was the best describes the expectation of security.