We have 3 little kids (all under 7), and we enjoy our time at WDW. Our success lies in not worrying about the increased costs of things (but we can't control it, we only budget for it). and instead look at ways to maximize your "time". So, we never rush around trying to pack our days with rides...we lazily go from pool to lunch to ride to walking, etc.
Also, wee enjoy the
genie+ LL+ park ressie changes...and here is why. While yes, they add cost and restrictions....they have reduced crowds at the parks, so walking around is more enjoyable. and once you spend the money on those perks...they save you time. One of our best days at VGF was entering the park to ride Seven Dwarves using LL+, and then starting to book afternoon Genie passes (anything after 4pm). We then proceeded back to the VGF pool for the next 4 hours, took a nap, and then during that time, I booked 4 more fast passes....so by the time we walked back into Magic Kingdom, I had 5 Fastpasses lined up between around 4 and 7. It was bliss.
We focused on what we could control, and in turn, our entire family enjoyed our week at WDW.