Well EFPS doesn't update the EOBT when a big delay results. About a month ago when Paris had severe thunderstorms the average delay was over 180 minutes. Aircraft who were ready for their initial EOBT and had waited for the 3 hours or so had squawks dropping. The only way to re-enter them from the tower was to update the EOBT but this would have caused futher slot delay. I think LTCC did the squawk re-entry for us. Good system.....