Having flown all three, definately prefer GE's idea of getting rid of EPR. Absolutely useless guage. Good for setting power but if you want to know how your engine is doing, look at N1, N2, EGT & FF. Never EPR.
Well if you would add in a pressure measurement or two (EPR is an example) then I absoultely agree with you. But how many pilots can really discern how much thrust they are getting by interpreting N1, N2 and EGT. Yes, I agree that there are some charts for a normaly functioning undamaged engine, but I doubt that you can tell anything about thrust for a FOD fan in a pilots seat by reading the gages you cited. I would recommend looking at airspeed and deducing thrust loss when you've got a damaged fan (N1 & N2 and EGT out of whack) and no EPR reading