Yep I figured that out an hour ago lol. So I've removed the infinite loading issue but it still doesn't seem to be using those files for the mechs because none of the edits I did have an effect.Since it follows standard csv format rules, the first line of the file tells you what each field is... one of the fields is called 'assetBundleName' and tells it the name of the asset bundle to look for the data in. Data in normal files leaves that blank.
So I think you're mostly there and that you just need to delete the word 'flashpoint' from each of those lines. So you'd have nothing but three commas between the Z and the first False.