Yes. Humidifying air can be a great help. From what I have seen the HVAC industry has yet to devise fool proof humidifying systems to their forced air systems. Most are simple in design, using a small cup of water built into the plenum of the air handler. Where it breaks down is that they are not easy for the home owner to access for regular maintenance and their design does not have fail-safe mechanisms to prevent flooding when the calcium build up prevents the simple float devise from shutting off water flow.

Another negative aspect of modern heating systems is the near lack of control over how much heat or cool each room will receive. We are trying to heat and cool entire houses uniformly. This is not cost effective, and with always high energy costs a waste of money. My 1835 row house has a door on every room and the two stair cases. When it was heated by 7 fireplaces the people would keep the doors closed to prevent heat from escaping and resulting in a cold first floor and overly hot 3d floor. With the current desire for an open plan house there needs to be additional ducts and fans, in the ducts. to recycle the $$ heated warm or cool air.

People are different in what is comfortable for them. With that logic I could comment on people that are hot at 75. 70 is chilly to me and to be honest, I would prefer somewhere in the mid 70s to about 80.