Creating Animation Presets with Relative Expressions from Existing Comps

I'm looking for a way to take a comp with an existing animation that's rather intense and create an animation preset that works on comps of all sizes. 

Thanks to Envato Elements, I have numerous existing compositions with animations that I love.

The problem is that almost all of the existing comps and animations (especially the ones that aren't text-based) use exact keyframes instead of expressions or percentages, so everything is way off when I try to transfer it over to a different element. 

Here's an example of an animation I'd like to make into a preset:

Does anyone know of a simple way to take all of this craziness and create an animation preset from it that's relative to the object's size and starting position?