Questions about Draw Warding Circle

[Madame Endor]

The warding circles from Draw Warding Circle seem rather weak given the definition in the text. A straight forward reading would seem to indicate that they only impede movement and nothing else. The creatures mentioned as examples are a ghost and a devil, both often have much more than movement and natural melee attacks as options for actions.

So some obvious questions are:
* Does the circle prevent ranged attacks from the creature from crossing it?
* Does the circle prevent the creature from using a reach weapon to attack anything within reach on the other side of the circle?
* Does the circle prevent spell and supernatural effects of the creature from crossing it?
* Does the circle prevent creatures summoned by the creature from crossing it?
* Is the creature able to enhance themselves or heal while in the circle?
* Is the creature able to use enhancements to their communication across the circle like Glibness?
* Does the circle prevent the creature from using teleportation effects like Dimension Door to get past it?
* Does the creature automatically know that it can't get past the circle?
* Will some contained creatures expend efforts getting past the circle?
* Is the boundary that can't be crossed a cylinder projected up from the circle? If so, can the creature fly within the cylinder? If so, is there a height limit for the cylinder?
* Is the boundary that can't be crossed a hemisphere up from the circle?
* Does the circle prevent burrowing, travel modes through the ground beneath the circle, or digging under the circle?

[Blake's Tiger]

This seems like the traditional summoning circle, but… are there any spells or rituals that summon a creature that isn’t compelled to obey you that would benefit from this ability?

And if not, how do you get something that you’d contain in one to sit still while you draw one?

This seems a bit niche and limited in frequency during a campaign to spend a feat (and chapter text) upon.

[Zwordsman]

I love the idea of it. But I've rarely had a chance to use it due to it restricted to find flaws target and only slowing movement.

I'd love if it was reversed. It denied more and you could add a small amount of folks that are permitted.

Or if it's find flaws only it needs to be a bit stronger or at least bigger.

I'd love if it covered more interactions. Or provided a debuff or buff vs the target for those inside or outside respective. Obscurement from the one find flaws target.

It feels too limited atm. I'm a fan of it denying movement or providing protection vs creature type. So you can identify things. And prepare it to seal off an area. Or create a killing ground etc.