You would likely find a lot of mothers using those stalls even without the baby changer, because the stroller will fit in.
oh, i know, especially at disney. i love how mothers refuse to leave a stroller outside a restroom or even outside a stall, and yet you have to leave the stroller outside of EVERY attraction, unless you have a special need. If hte child can stand, i would prefer you have the kid stand in a normal stall if at all possible. obviously someone with an infant cant do this... and sometimes the normal stalls arent big enough for this.
in disney, i have had a mother cut me off with her stroller (and my brakes are my HANDS people!) so much so that my sister walked into the back of my chair so she could get to the handicapped stall first. She never took her child out of hte stroller (i can see her feet under the door, and the stroller wasnt even facing her), just used hte toilet herself. I understand using the bigger stall for convenience, but it is just BAD KARMA to cut off a person in a wheelchair so you can pee pee faster... i just sat there and laughed, and when people asked if i needed help, i said politely, though audibly, "no, I have to wait for the handicapped stall. I am sure she will be done shortly." yes, that may have been snarky, but she was rude and could have hurt me (hands + spokes = pain), so i didnt really feel bad about it. and i did get to use the toilet eventually