I'd love to help but I don't really understand the question. The parks are all much bigger, and going back to your hotel at WDW is similar to traveling from Sea World to the southern end of Surfers or Broadbeach on average (haven't stayed at POP but apparently it's in a pretty good location though so you might be a bit easier than where I stayed on property, one of the All Star Resorts. Open late though so potentially worth the effort if you've got kids with you.
Per park is tricky, but for my tastes I'd say 6 days overall with the option to park hop, though again haven't done that since they brought in Magic Bands.
Disneyland most hotels on Harbour Blvd are within a 20min walk of the park, I'd plan a stay of 4 days for the 2 parks. You'll still miss stuff but you hopefully shouldn't feel too 'rushed' and you should be able to more than easily do the things you wanna go on, and lots of re-rides on the kids favs.