I think I'd pay good money for someone to learn me how to cut big white oak and hickory without boring and with no fiber pull from the butt.
Forget it, in timber like that I'd pay you big money to do it just the way you are. Medium sized, and without head lean, sure, but wood like that needs to be done just right.
I don't necessarily agree with the deeper face either, cause you build a lot more tension in your backcut wood.
Coos bay functions really can do a lot for you, how you progress your back cut so you get a lot of wood cut before movement will expand your ability to backcut more.
Boring the heart is always good insurance. just a *** with the corner of the tip when the face falls out.
White oak and hickory, you named it, those are the 2 that will really show you when you've not done everything perfectly. Open faces help prevent fiber pull, but clearly you know that.
There is a time for experimenting, and a time for fundamentals, choose wrong and you can bust wood, or, worse.