I was already so anxious about having to fly with our preschooler and toddler from KC to LAX (even with a set of grandparents traveling with us), so I can't imagine going all the way from KC to Australia! Very smart to break it up with a stop at DL
Our first ever trip to DL (and our kids' first Disney trip ever!) is the week before yours (heading home on the 4th), and prior to Southwest opening up their late fall & winter schedule, I had just been using the Sept and Oct KC-LAX flight schedules as a rough guide to help us figure out which flights would work best. As of then, there were no nonstop flights from KC to SNA and I didn't see KC listed on any of the Southwest announcements about new nonstop flights for SNA, and DH just does not want to deal with layovers with the kiddos at this age. Then I got up at 5 am on the day the schedule came out to get everything booked, and the nonstop flights to/from LAX were super expensive and at terrible times! I started to freak out a bit and then thought to check KC-SNA just in case, and like you I was pleasantly surprised to see nonstop flights! I thought for sure we had already used up all of our pixie dust for this trip by securing the VGC rental, but I was very happy to get a little more!
I'm a little bummed that there will most likely not be the sparkling icicle lights on the castle for Christmas this year due to the 60th anniversary bling, but I guess that will just give us an excuse to go back in a year or two