Just upgraded to Photoshop CC and am having this issue too. If I click off a path to deselect it, the focused layer gets deselected and the layer panel jumps to the top of the list. This is horrible if I have 75 layers and the one I need is near the bottom, it completely dissrupts my workflow. Why does the path selection tool affect the selected layer? Both types of path selection tools cause this.
I don't know why it does it, but it is extremely irritating and has added considerable delay to my workflow.
And apparently no one else knows either (or cares enough to provide any sort of insight).
Same issue and I hope it will revert to the CS6 status. Best work around may be to hold command key and hover over the subpath which will bring up the direct select tool. It would require relearning and it's definitely a hassle.