Your shields really shouldn't drop on a PvE corvette.
Yeh, I've never had my shields drop yet. Only reason I've needed hull so far has been the wing assassination target of 3 vultures and the FDL target. They use phasing sequence.
I once shed all hull (right down to lightweight, stock armour) for science to see if the agility changed enough to matter. It was better but not noticeable enough. Particularly when I noticed, on the last Vulture I was killing, my hull integrity was about 20%
Yeh, not doing that again. Same would apply if I'm going to take on spec ops.
But in all other scenarios, I could shed all that hull and not worry at all.