I like this to a point. It is already set that when a changeling dies an echo of their mind lingers within the hive mind and may even haunt the Queen and any others careful enough to listen to it.
The idea that a drone’s every thought, idea, and memory is transferred to the Queen upon their death though, that could cause some severe mental issues if something happens to the hive as a whole. Such an influx of information would be incredibly difficult to deal with, and if more than one or two changelings were to die at once, the burden could be too great for the Queen to bear and effectively ‘break’ her mind for a time.