1. UA - how does it account for variation in gravity with heights?
2. UA - other celestial bodies except earth stay in relative position, however based on what you say, a star, which has more gravity would move faster.
3. Special relativity - you say that the acceleration would slow down so as not to reach the speed of light, which is generally true, but gravity is constant - explain please.

If any FE believer could explain to me how UA works in regards to those in an FE model that'd be great, as the wiki doesn't have too much.