It seems to me that if anyone has too many alerts then things aren't managed very well. Increase storage, trade, shut down production, increase utilization, etc. If my buildings are wasting time then I will think I need to reconsider my economic balance. It's clear to me that many people had no idea how poorly their kingdom is utilized.
After reading more comments and some additional thoughts I can see how some people like to have on-demand capacity without having to manipulate buildings or storage and after all it's all about playing the way you want. So I think it's clear an option each player can control would be the best way to go.