Hello, Brett.
I have a similar problem on one of my custom designed boards. Other two works fine. This one's MCU gets hot very quickly up to 95°C. But it still alive :) TP70351 gets heat up to 65°C. The step-down regulator MP1593 stay at 35°C. The 3v3 and 1v8 looks like is shortcircuted somewhere. They has just 2.5-3.0 Ohm between outputs and also 3.0 Ohm between each and GND. Tomorrow I will try to solder out 70351 and take a look.
What is U2 on the Docking station? I've looked at sprc905 and didn't find the U2.