I would keep the boost, but I did away with my fp on one car. Much easier to keep your eye on the boost gauge and more likely to notice a busted wastegate hose that way (or the boost suddenly going away) plus I always check the vacuum side of the gauge when I crank it up for signs that something might be awry.
So far, the fp has worked well but then I bought a good sensor and not one of those brands like Autometer that is prone to failure