Drones are dependent on an active satellite link to function. What happens if the enemy jams the satellite?
On the subject of electronic warfare - I assume it's still very classified but given that the current teen series aircraft apparently have some serious EW magic in them (I don't have any citations for exactly what they can do other than I read some comments by IIRC an Australian ground radar operator and apparently they were completely outgunned - i.e. fake formations rather than mere jamming) I think we will be reading about exactly they can do at great length on the hackernews's of the future.
Not very much, the datalink is sort of peer-to-peer - the F-35 is one of the first aircarft to have a satellite datalink.