Well, any boost mod won't do alllll that much, in my opinion, by it's self.do boost pin, max boost (wastegate blow off delete) and fuel all at once.You'll see a difference there!I think one mod only allows for the other mods and all together you get a nice thing.
my experience of diesels has been the opposite of yours. Modern PDs TDIs D4Ds etc all needed revving and lacked torque much like a petrol.