If we go back to the 3 vector spaces.

1) The free fall, orbital space.

2) The free fall, escape space.

3) The orbital, escape space.

Then in each case the lambda scalar can take on any value we choose. If it is zero then we can equate that with no energy and no mass. So we end up with an absolutely flat spacetime. We can set it to a value between 0 and 1 or we can even set it to an imaginary or complex value.

Whatever the scale region of most interest lies between the energy surface of the event horizon and the light-like energy surface. At very small scales this is not a tenable environment. The tidal gradients fall withing the radius of elementary particles. As the region is scaled up particles have much more freedom to move as long as the motion is not perpendicular to the field. There has to come a point in the scaling operation where a boundary is reached that brings the surfaces described into the quantum domain.