I can really see what you're getting at. I would say to use the tools for what they do and not based on their name so much. I've learned that a long while back with most art tools in various programs.
I tried your oil brush challenge and it wasn't happening for me the effect you wanted either - just using the one tool. I found it worked more like acrylic than oil.
Waiting to see if you solve the problem or someone comes in with a way to do it.
"Not a bit is wasted and the best is yet to come. . ." -- remembered from a dream