Bird in the hand is worth 2 in the bush is a fairly good reason.
Interest saved by paying off mortgage?
I think I'm right in saying that when you commute, your pension reverts at age 55. Not just adjusted for index linking but back to the non commute level so effect of commuting is not for life just till 55.
Same for PVR I think. eg take PVR table pension value and then it reverts to normal table at age 55.