I think the main issue with the Growler is the same as that for all F/A-18 variants: range/endurance. The Prowler could stay aloft a long time. The Growler’s capability in that regard has to be made up for by more frequent in-flight refueling.
I am somewhat curious about going from 4 crewmembers to 2. Looks like 1 will be doing what 3 used to do. I suppose automation and computer processing speeds have enabled that do be done without significant issues.
Depends on who you talk to. ECMOs who have flown in the Prowler have complained about the workload and transition; steep learning curve. ECMOs who have enterred into the VAQ community directly to the Growler, not so much but they don't have anything to compare it to.