Be aware that between November and March, Orlando does not necessarily have shorts weather every day. On some of our November and December visits it never got warm enough to wear shorts at all during the course of an entire week.
When we visit in late fall, winter or early spring, my go-to "bottom" item is ripstop pants that can roll up to capri-length and button, because I can wear them full-length in the morning and after the sun goes down, and roll them during the warmest part of the day.. I dress DD the same way, and the guys tend to prefer zip-off sport pants for their versatility.
In case of cooler weather, I also pack 4 "must-bring" items for each of us when we visit during this time of year: lightweight gloves, a windbreaker, a light fleece jacket, and a pair of silk long underwear to layer under thinner pants if there is a cold snap.
I can't count the number of times we've seen people walking around the parks huddled in a character hoodie with their legs tinged faintly blue because they mistakenly thought that Orlando always is warm in winter. Orlando is definitely NOT Miami; and it can get quite chilly due to the frequent rainy weather in winter. The average temperature from Nov-Mar is in the mid- to low-60's, but freezes do happen, especially at night.