Ok, I'm a life-long Texan so here's my two cents: pack for cool-cold mornings and evenings (32-35 degrees) and warm to hot afternoons (60-85 degrees). That is a "normal" Texas winter day. For example, I send my kids to school in jeans and a short-sleeved shirt with a jacket. They ditch the jacket about 10am and my oldest comes home at 3 and puts on shorts. Then they wear flannel pjs to bed. The same will go for the day in Orlando. The weather is generally more mild though so u can probably skip the jacket if you don't want to be stuck carrying it all day. Go out on deck four before you get off the ship. If you can stand there with no jacket, leave it. It'll be warmer in Orlando.
If you're used to northern winters, you'll probably be fine with capris and a light jacket for morning and evening. I'd probably reserve shorts/tanks for the beach though.

We southerners tend to be a bit more susceptible to the cooler temps just because we experience them for such a short time every year, if at all, so our family will be packing mostly jeans (much to my daughter's chagrin). Hope this helps!