This isn't referencing MCO but I did have to fly recently (through Atlanta, Detroit, and Boston). In general, the security lines at all airports were low and got through quickly. We have N95s so we wore those the whole time, although research right now is showing that as long as everyone is wearing a mask then a surgical mask or similar is protective. The majority of people are wearing masks (the worst was Atlanta where we had tried to give ourselves a break with surgical masks but switched back to N95s because so many people just weren't wearing them). Atlanta was also the busiest. Boarding is actually a lot more pleasant as they did it from the back of the plane to the front so there wasn't a mad dash to all stand around for your boarding group.
Again, not MCO but I imagine as it's such a big hub experiences would be similar. We didn't really encounter any huge bottleneck points at any of the airports but that's not to say they weren't busy. I think as long as you're wearing a mask, keeping distance as much as possible, and hand sanitizing you're OK. At least, it's the best and most you can do given the circumstances.