I mean the FE UA vs the Universal acceleration of the universe in RE.
One of these is insignificant in comparison to the other, yet RE'ers are unable to comprehend the insignificant of the two while asserting the fantastic.
Oh, I think you misunderstood something very very wrong.
There is absolutely none (well, with about as much certainty as possible) universal acceleration of the universe in the round earth model. However, I think you might have heard of the expansion of the universe, and that the expansion rate is accelerating, according to measurements of redshifted light. Those two are obviously very different statements.
And anyways, I can't see how the expansion of the universe has anything to do with the shape of the earth, so a round earther can (and some round earth scientists actually exists) believe that the universe is not expanding, and it would have absolutely no impact on the science of the earth.