respectfully: I disagree. The inside of the expanding sphere model represents the time that we have passed through, the past, even if all events always happen in the skin, where the "now" has actually no thickness.
And now model a big crunch universe in the same way. At some point, expansion stops and reverses. In the original interpretation, this is fine: we see the skin contracting, galaxies getting closer to each other, etc. In your interpretation, time itself would reverse. That's non-sense. In other words, the radius of the balloon analogue is not related to time.
The two dimensional surface of the expanding sphere is not all there is.
In the original interpretation, it is.
The multiverse theories for example speak of more bubbles out there in different time "locations".
Which is something not covered by the balloon analogue, as that's not its intent. In fact, multiverses are pure conjecture at this point, and not part of mainstream cosmology.
Any traceable radius represents the time or world line of its point in the periphery since the beginning. That radius, is always at right angles to the tangent on the curved surface point.,- not unlike in our diagrams, where the time axis is normal to the space dimension.
(Have already been proven incorrect above.)
as to Hawking's radiation, way too high for me, but it does not mean that the deep well disappeared singularity is in a catch up race through time with us .
Actually, it does. When the black hole evaporates completely, there is no dimple "stuck back in time" left. I.e., it must have caught up.
The BH effects on the "skin", dimpling, tear,or tension, acceleration if you will, lingers on, even if the mass has disappeared from our realm, that skinny realm we call "now".
Simply wrong. After evaporation, there is nothing left stuck at the black hole formation time or at any other time in the past.
ps: may be the Hawking radiation would smooth ou the effect of that steep gravity gradient, call it the ultimate skin rejuvenation treatment.
No, the Hawking radiation reduces the mass of the black hole. That's it. Any other effects are a result of that mass decrease.