At least for now, FreeCAD Path-WB has areas that are open to further development. That said, it sure is exciting to me seeing how quickly improvements roll out. One example of many is how Shai's Path-Simulation went from a discussion to an integrated reality in less than a month I think... At the moment, there is momentum towards releasing v17, and so there's a lot of tidying up and things do change in use as well at times, so the each time you upgrade, things may behave a bit differently.
For myself, I have had success in working around the few things that otherwise are difficult by adopting some strategies. One is to think about the limits of Path-WB from the ground up when developing my 3D model. There are often multiple otherwise equivalent ways to implement the 3D design, but--for example--in some cases, you leave useful edge-loops where in another implementation, this isn't true because the contour you need took a Z-change that isn't helpful.
There are also cases where slightly counter-intuitive approaches allow me to achieve results I wasn't otherwise able to implement. For example, in cases where I want to use a tool to face the top of material I am leaving--the top of a small cylinder or square, or such--but where the diameter of the Tool is too greater to fit inside the material being top-faced, I can define a Contour-OP based on the Face, with defined the Cut Side = OUTSIDE, but then adjust the Extra Offset Field to equal -r, where r=radius of your tool causes a cut along the edge of the Face, etc...
Also, don't get too caught up in precise equalities as FreeCAD is weak there. Specifically, what I mean is that modeling a PAD on top of another PAD where one or two of the edges are intended to be exactly touching the bottom PAD will often benefit by leaving a 0.001mm gap or such--practically, your machine won't know the difference, but it will often make Path-WB easier to work with. Same thing with defining exact diameter and allowances on your model relative to your Tool definition. In some cases defining a 6.35mm Diameter tool as 6.3499mm may fix things that should work but don't seem to.
Another thing I've found is to try different approaches--even when I wasn't aware it's allowed. Recently I selected the external Faces and found it allowed me to use these to define a contour cut. I think that used to be true, then wasn't, and now is again
. It's in development, so give things a try.