I don't know how you can help to make the descriptions better, but I can at least explain why the desriptions are so bad. as far as I know the steiner modding group was originally a german group making mods for this game and I guess they didn't know a lot of english so they probably used google translator or something like that.

The creator isn't a native english speaker. IIRC hes German so the descriptions being meh isnt exactly his fault.

If you want to change the descriptions I imagine you can edit the unit files to do it.