As GT3 says, it does not update the EOBT if a slot gets allocated.
We can ignore slots if there are MDIs in force and a/c call in time to make their CTOT. Flow were happy about this, but asked us to update the EOBT to aid their planning. Of course, having updated the EOBTs, new slots got allocated another few hours hence, and then flow told us we had to depart on the slots, as the MDIs were due to end before the latest slots.