ARGH! Just got an update from the touringplans.com crowd tracker with huuuge changes in the crowd calendar estimates. Epcot on the 20th is going from a 1.1 best park to a 6.3 park to avoid, and there are a bunch of other changes as well.
Sure, I have plenty of time to re-work our schedule now, but what are the odds that everything will change again once we have all our ADRs set up?
Yes, everything will probably change slightly, but it's a fact of October visits that EP will always be busy. That is especially true on weekends. Strange that they would ever have EP as a 1.1 on an October weekend. According to easywdw, EP is only recommended on 10/21 and 10/24. Do your adjustments now and hope for the best!
Cape May is maybe a 10min walk from the International Gateway in EP (in World Showcase). Since your family loves seafood, I say go for it. We love Biergarten. Also love Via Napoli.