I would have to agree with everything that Princess in Oz said, it will really come down to how your family likes to tour. As you are very familiar with Disneyland, I would image the idea of NOT park hopping would seem very strange.
But the parks in DW are bigger and more spaced out so park hopping isn't necessary, you can easily spend a day at each of the parks without the 'need' to jump over to another. However, as Princess in Oz did point out, it can limit any table service dinning plans. If you plan on making any dinning reservations, you will need to make sure you also book your fastpass+ for the same park on that same day.
Personally when we visit DW I don't purchase the park hopping option, but only because I am on a budget and I am looking to save a few dollars
I am certainly not put off park hopping at DW, but as Princess in Oz mentioned, you just need to allow time to get from one park to the next. Not sure if you are aware, but the Disney buses only go from resort to theme park/Downtown Disney,
not theme park to theme park (ie you can catch a bus from Art of Animation to any of the theme parks but once at that theme park, you will have to catch a bus to a resort and then transfer there to a bus to a theme park - that's that bit can take time).