I know you're being sarcastic because you see my post as impatience over the guest announcements. In reality I am much less concerned with the guest list per se than I am with how FE is going to attract the congoers they need to attract to make this a successful comic show with two fewer months to do it. The vendors that do your show need buyers to show up, including the comic vendors. If you don't accomplish this you'll see your comic vendors spend booth fees elsewhere. FE may be perfectly happy to sell those booths to skin care vendors or local insurance agents, but it isn't going to help your shows attract buyers who spend serious money with vendors.
I know none of this is your fault specifically, but for comic vendors I know and spoke to 2016 was a down year for sales. If that trend is not reversed in 2017, and this radical date change has me worried, then I suspect a lot of folks will find something else to do in 2018. That would be a shame, as I look forward to this show.