When things fall, they are universally described to be going "downwards," (unless you ask AATW...)
Do what? Of course things fall downwards. So long as we understand that "downwards" is a relative term, like left and right.
My question is what in your model means that when you release an object it moves downwards rather than upwards or to the side.
You said "aether is a fluid and it acts differently on objects due to their density and mass in different locations, due to the nature of aether"
I mean, honestly, that sounds like word salad to me. But you mention density. A ball is more dense than the air below it, but it's more dense than the air beside it and above it too. So why does it go down? RE's claim is that it's because there's a force acting between the ball and the earth. And the direction of that force is towards the centre of gravity. Which, from any point on the earth's surface, is "downwards"