Had the fuel injectors replaced with a FiveO Bosch set. Also had the FPR replaced and thermostat & housing replaced at the same time (there was some coolant oozing from the area).
I just did a quick outing last night after picking up the truck, but it does seem that the hard warm start issue has been vanquished! It was an annoying issue, but I'm not really sure it was worth ~700 to fix.
Can't say I noticed a real difference in the drive with the new injectors, not that I was expecting anything major. Acceleration may be a bit smoother when going easy on the pedal. I'll need to drive more to see. Also hoping to maybe finally get close to 10mpg one of these days now!
Truck is now nearly where I want it. Last few things to do are fixing the door locks, replacing rear shocks, and maybe getting a blackbear tune as well as new splugs and some middling body bits (driver's sun shade, rear bench plastic coverings...).