I do appreciate that every summer Funcom increases the building and thrall decay times from 10 days to 20 days. Unfortunately the latest mistake, caused quite bit of havoc.
Why not just keep the decay timers at 20 days, all year?
This would negate the concern of this mistake happening again, and I know most players would support the increased timer (I have lost 9 massive builds and hundreds of hours of time because I logged in on day 11 or 12).