If you're going to use EPR to set thrust, I much prefer R-R Integrated EPR (core + fan). P&W uses core EPR only, and its long-term accuracy (EPR vs actual thrust) suffers as the engine wears in (seals, shrouds, etc.)
agree
I've seen mixed flow EPR readings (long duct fan air mixing with the core in the tailpipe) getting badly screwed up with some fan FOD damage leading to a control system overboosting the core. but life is just a bunch of trades
