There is a lot of force required to plug/unplug those MicroUSB connectors. The port should have been soldered and pinned via thru holes. And then "captured" by the case so that there would be no shearing forces transferred to the PCB when plugging and unplugging the plug. Especially from a device that may need a plug shoved into it 5-10 times a day if you are using it a lot and traveling.

This is similar to how I/O jacks are done on audio gear. The port is thru pinned and then fastened in some fashion to the front or back panels.