@PdotdQ. Comment and question
If the universe is a sphere (strange, but why not? Let’s go with it for now) and a hyper-dimension is returning flat space (I said the time dimension was split, but folks don’t like that. Ok, fine. I don’t like extra spatial dimensions so we are even. Ha.) But ok, I will concede for discussion sake. Give the system a hyper spatial dimension. Don’t you still have to hang an extra clock on the extra spatial dimension??? I say yes - at least I would certainly want to in order to get a good reading on the overall expansion. And two clocks that are clocking the expansion of a sphere should return an accelerating universe. That’s my view. What’s yours?
Just for the record, I have no problem whatever with an accelerating universe.