The biggest flaw with the FE "idea" is atmospheric containment. If the Earth was a flat finite disc, then airplanes would not be able to fly above the lowest point of this ice barrier. Due to UA or gravity, the atmosphere would flow outward and around the edge of the Earth. The atmosphere would reach a point to where it was contained at the lowest point of the ice barrier. There is no detectable aether that would contain such atmosphere. The aether would not even be able to contain the denser material of the atmosphere and would have to be smaller and lighter than neutrinos to have avoided detection. There are no other explanations for an atmosphere existing at higher altitudes on a FE unless you consider Earth to be an infinite plane which is more absurd than a FE.
The problems associated with an infinite Earth are tremendous, such as the spotlight sun illuminating all of the infinite Earth, or how the governments involved in the conspiracy must continue to kill all of the explorers trying to reach us from the other side of the barrier. Mainly if Earth was infinite, then we should be contacted by civilizations on the other side. At least we would have proof of their radio and TV signals.