Thanks all!
I will look at plotting the RPMs along with fuel pressure, if possible. I'm new to the app, so I still need to learn it's full capabilities, but I only recall seeing the option to measure one item at a time. Both of those charts show a WOT pull from zero to 60-65MPH if that helps you estimate the RPMs.
The updated tune LMS sent is supposed to address 'fuel system limitations', and they pointed out that they observed a demand for 30-40% greater fuel above 4-4500 rpm, as a result of cold weather and differences in fuel (I assume they mean winter blend).
My goal here is to have a tune that utilizes, but does not exceed, the car's stock turbos, fuel system, etc. That said, if the hesitation returns with my original tune I guess I'll just switch to the updated tune they sent me (very fast response from Livernois BTW) and go from there. Given the reliability issues I've had with this car to date I'm pretty sure my upgrades will be limited to just the tune.