Offering a refund seems fair to me. Some ships surely have higher drop chance than other, and since this was not stated in the description, I can understand that some people got upset with that. So they can get a refund if they want. But calling this a false advertising and even wanting to sue WG? Come on, the description at itself was not false. Because from what I have seen (reddit spreadsheet etc.), you COULD get any ship from the list without having one from the "shortlist", it was just that the shortlist ones were more common.
So WG - not the best initial decision, but great response. A lot of other companies would not offer to give people their money back.