I would ask him to change your idle speeds.
This is the chart I asked him to use. I got it from the 454 thread on FSC. Compared to the lower speeds and now, I DEFINITELY recommend doing this.
The drivability of the tune is nice. The fuel cutoff seems.... Aggressive... It will be a surprise but you'll learn to live around it until you can tune it yourself I guess. I'd like it to keep fuel on a little longer myself, maybe 1-1.5sec longer.
I also asked for torque management to be deleted and for tow-haul mode. The shifter that you need is simple to put in, so I'd ask for it. I did ask him to set PE to zero, and he said he never does that... And I believe he did not. Look into it once you get your tuner.
Here's the idle speed chart:
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