Yup! True that! Your hull configuration is the answer to moving through the mess.
I was considering mounting a piece of ss cable between the fin and the leading edge of my rudder. I went as far as preparing the fittings and drilling a hole in the keel. My design would have mounted a small "bail" on the rudder so a loose fitting cable could swing through the rudders scope. It still sounds like it will work. It should deflect lines an wouldn't add appreciable performance concerns. I may dig that box of stuff out and give it a try next season.
Has anyone done it or seen it done?
Adding a 3 blade prop may have slowed me down a little but I don't notice it. The A-4 is happier and I have reverse power now. I would trade a little more drag for no worries.
Your hull has a lot of other comforting qualities to recommend it. I will stay with the pointing and speed we get from our fin/spade.
We do have a small Marshal Catboat that makes the lobster pot issue moot!