Syntax seems rather complicated, especially with the optional percentage things. And usually I'm changing multiple properties of the same element (x/y or vx/vy). Not one property (type) of multiple elements.

Sounds like a situation where someone should write a lua script that has simple syntax and is easy to understand. Then you can just call a function in the console, from that script. Not sure if LBPHacker's script does complex stuff like this.