It happen to me as i think it happened to manny casual players to log in after a few days and see that portions of your base disappeared.
This happened because of the high quinque time at the start of the game and the casual style that i play.
It was extremely disappointing to see that portions of your base disappeared and i decided that was not worthing and i quit playing (it was more like a job).For example you couldn’t go in a holyday or you’re base will vanish.
When i heard you consider to put 17 days decay, i decided to play the game again and so i did.I think this is the perfect amount of time for decay sistem.
I hope you keep the 17 days for good.
Thank you for the amazing game!