I just managed to create a API Script that allows you to determine the distance between two tokens on a Hex (H) Grid. I just managed to finish this and I will be updating this later to include Hex (V) Grids. For now this is a proof of concept that you guys can test for yourselves. For right now the Macro I am currently using to run this is "!token @{target|Token1|token_id} @{target|Token2|token_id}".
https://gist.github.com/e5124cfa7c8c331c70a9.git
https://gist.github.com/e5124cfa7c8c331c70a9.git