Just went and picked the Suburban up from the shop. I don't think the brakes have ever felt this good!
Not sure but I suspect the new fluid and ABS bleed had the biggest effect. The brakes start grabbing within the first inch or two of pedal travel and everything feels very responsive now, feels very similar to the pedal in my red truck after the brake overhaul was done on it.
All parts selected went on with no issues, except the main hard line to the rear brakes was a little too long. My mechanic cut and re-flared it, no problem.
Thank you all for your input! I'm very satisfied with the results.