Diz, I was a WDW lover throughout my son's childhood, from his first trip at age 3 to his last at 15. We would only go TO DL when we couldnt afford WDW. I hadn't been since the early 2000's. Last year, my iDH said he wouldn't go to DL but he would go to WDW. So off we went in early-mid November. Everything was already decorated for Christmas so that was nice. But, honestly...I don't care if I ever go back. Crowds were not bad but the size of the place just overwhelms me now at age 70.
I'm in generally good health (besides my menieres) and we walked several miles each day. And I am a bit of an adventuress, too but just the enormity and well, its like there were TOO MANY OPTIONS! Its like when you goto your regular diner and know what you're going to have (DL) and then you go to this super fancy restaurant where the menu is 20pages long (WDW) and you're kinda dumbstruck. Now i've probably been there ten times but there was a lot of new stuff to see...and stuff that we used to do that was no longer.
You know how we lollygag through DL, not really feeling pressured to do this or that? WRONG! I just felt like we were kinda on the go the whole time. I mean,we did take time for some special meals like Jiko, but our pace in the parks was pretty go-go-go.
You know how you know all the secret places atDL to get away fora few minutes to get your bearings? Never found those at WDW. There were always people everywhere. Now, because there are more parks, the people disperse, but you will not find that quiet moment, at least I didnt.
All that said, its a remarkable place with many wonderful attractions that DL doesnt have, likeSlinky Dog and Mine Train, Remy, just walking through the lands at EPCOT.
Many fabulous places to eat. Beautiful resorts and grounds. Disney Springs is like a mini mall, way bigger than DD.
I dont know how long of a trip you are planning, our last was six days in park, two travel days on each end because its a long flight from CO, but even longer for you. Thats another reason...I cant do a flight much longer than 3 hours, it just messes with me(again, the menieres).
Bottom line, only you know what's best for you. It would be an awesome trip with those wonderful daughters, creating great memories for all of you. Start list with your pros and cons, talk it through with your daughters on what their expectations are, and then you can make the decision best for you.
Hope this helps...