update: Two nights ago did a 3rd/4th gear pull, slowed and attempted to take off again...BAM 3psi. changed maps, set to stock, shut down, restarted, checked codes, etc..yesterday got the car back to inskip(runs/drives fine but NO power)..a wastegate actuator arm fell off its pivot...must remove the turbos to fix..got a new 528 for a loaner. they're also doing an oil change and alignment. I also brought up a strange shudder when accelerating over 50mph but at 3psi it is not existent so they'll investigate further monday.
overall still very satisfied with how they're handling everything...maybe i have more patience than most considering i'm a service advisor as well.