FPR is a valve that allows fuel above a certain pressure to flow back into the tank, once it's completed the pump -> filter -> injector feeds circuit.
One thing I have never done is replace the fuel filter. Could this be a factor?
How long have you had the car? Change interval is 30K-ish (not sure without checking manual), or 48/60 months (maybe less, again not sure without checking manual), whichever comes first.
c) look at braided hoses?
The point with the hoses isn't so much to get stronger/better ones, just to get new ones. I personally prefer to upgrade if I can rather than replace like-with-like, if I have part go bad, but that's just me.