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An update for anyone who may stumble on this thread: after swapping out the HPFP and HP fuel sensor, the long crank is now resolved. The car fires up in about half a second every time; cold, hot, sitting for a while, turn off and back on, etc. It doesn't matter, the car fires right up every single time. But the intermittent miss at idle is still there. I used new gaskets and was careful putting everything back together again. The carbon build up at the valves didn't look too bad. I'm now suspecting I have a vacuum leak as the car runs strong everywhere in the rev range, doesn't smell rich or foul plugs (no CEL or shadow codes related to misfire, fuel, ignition, etc.). The next step will be a smoke test to see if I can find a leak.
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