TimC-
regarding the Life as a lynx pilot, not a lot of experience, I was only ever on carriers, but has it's own attractions, you're correct most of the time 1 Crew on board therefore a bit more autonomy
I'm sure there are a few lynx type people out there who could help. Don't forget the mighty Merlin, also to be seen on a frigate near you- a VERY big a/c and looks like a lot of fun to fly.
Ref Sea King tasking- in the future- not too far away, Merlin will be taking over all roles on board Carriers from the ASW Seaking, so they may change, however SAR,VERTREP (vertical replenishment) and 'hash and trash' will all still need to be done. AEW aren't all that suitable, have a look in the back of one and you'll see why.
Don't forget, in aviation, particularly military, there's no such thing as a stupid question!