We're canceling our April trip and we're thinking about canceling November too. My husband and I are going on an Alaskan cruise instead. Until the FP+ wrinkles are worked out, we're traveling elsewhere. If things are more nailed down by October, we may keep our November plans as they are. Our last trip was April 2013. This is the 1st time in 15 years that a year will go by without at least 1 Disney trip.
Obviously I don't know your travel plans for Alaska, but if you would like a suggestion, keep reading:

When we went to alaska, we did a one way cruise, where we started in Seattle and/or Vancouver and ended up in Seward. We went to exit glacier and From there we rented a car and went to Denali State Park....it's the Yellowstone National Park of Alaska. So beautiful and so worth a few extra days. So much wildlife, mountains, and scenery.
Anyways, the difficult part is the airfare because your not doing a straight round trip, but if you watch it, you can get some good rates out of either Fairbanks or Anchorage. Plus the money you save not going to Disney you can put into the airfare

We are like you in that we DID Disney several times over the years. I agree that they messed it up and as a result, we will be visiting other places as well. We do have a trip scheduled where we leave on the 28th and I can honestly say this is the first time ever, I have NOT been excited AT ALL. Plus the fact I'm currently viewing it as our last trip, which makes me sad too. Oh well, the plus side, we will get to explore other places, and perhaps Disney will fix the mess they have made.
No matter what you decide for your cruise itinerary, you will LOVE your Alaska! I absolutely love the whales
