It would be great if we could see some indicator on depots that came out of reinforcement timer and are currently destroy-able.
Right now, we can see when depot exits reinforcement, but once that happen there is no clear indicator that this depot is destroyable and unless we were there before and seen the timer or we caused depot to go into reinforced mode there is no way to find out other than fly and check every depot.
If there was some indicator that the depot just exited reinforcement, lot of content could happen - pirates flying around could go destroy it, anti-gankers could stay there hoping someone will try destroy it, and much more destructuion in high-sec would happen.