I use a low action because I'm getting arthritis in my hands. And it's difficult to barre 1st & second frets if I don't. I also use fluorocarbon strings because even though they have a higher tension, they are bendier. And for me, easier to play.
Thanks kindly Kenn - and THAT is of course the key here. There is no perfect 'one size fits all' setup - only the setup that suits the player and still allow the ukulele to play as it was intended. Pete is right - the guitar world has a surfeit of people who seem to spend more time trying to argue the point on finding the 110% perfect setup - it bemuses me!