I don't understand your past/future argument, here.
We see expansion in every direction. But we're looking at the past, so what we're observing is past expansion, not present expansion.

SAME acceleration in all directions. Only a function of distance, not direction.
In a 3D model, sure. But this is 4-dimensional expansion. We're talking about spacetime, not space. The same acceleration in all directions is because we're always looking in the same direction... the past.

If we're seeing expansion at the very edge of the observable universe, then we're witnessing the expansion of the early universe, not the now universe. We know that was insane expansion. I mean, if we're seeing an acceleration of expansion, then surely what's actually happening is expansion is slowing down, because we're witnessing faster acceleration in the distant past to what we observe locally.

I'm just confusing myself here. I'm sure that made sense before I read it back.