I changed the pressure switch out as well. Pump and everything thing else is working fine. I even checked the screens on the faucets. The water will run a descent pressure and then slowly dies down.
You need a pressure gauge attached to the system to see what pressure the pump comes on and off. Sounds like it is not coming on soon enough. Or perhaps there is too much pressure in the bladder. The pressure in the bladder(measured with the pump off and the water pressure drained down to zero) should be 2 psi less than the cut on pressure setting of the switch.