When is the humidity a problem? If I have my thermostat set to 73 and the system is maintaining that through the day and night, will humidity be an issue? A variable speed system in a typically insulated home will likely be running at a very low level most of the day.

I can see it being a problem if I come back from vacation and change the thermostat from 85 to 73 and ask the A/C to get there ASAP, but even then the controller could know how much moisture is in the air and make sure the temperature drop is slow enough to deal with condensation.