I think @rpegg has the best conception here of what to do:
Chill out, don’t pre-think.
To be honest, the use cases where a hard stop at 0,0 that you can wedge material up against and you need to have done so are minimal.
The only thing which can align perfectly at a 0,0 corner is a rectangle. Most people who put a rectangle IN are not wanting to pull a rectangle OUT. ie - you are going to cut a shape out of the middle of this thing, and ditch the corners/edges as scrap.
In all of those cases… loss of a 0,0 endstop is a trivial loss.
In all of the cases where you are working with an initial “Not a rectangle” the loss of that corner is possibly a net gain, but at least not a loss.
So… the ONE use case where you want to have a 0,0 end stop, and may suffer for lack of it, is when you have something with a perfect 90 degree corner, and you absolutely do not want to cut away any of it (or you want to cut an insanely precise portion of it).
That simply is not a use case that will come up all that often for most people. Granted, for SOME people that is a “nearly every single time” use case.
But, it is still quite possible to create your own hard 0,0 stop. And there is a bit of a lip on the honeycomb which you could use (and keep a post-it with measurements for the offset from comb-lip to actual 0,0).
The manual drag and drop of your cut onto a picture of the bed will open up a lot of possibilities. But you will only make full use of this extra power if you actually use it.
Don’t judge the intelligence of the fish by asking it to climb a tree.