Adam, glad you did this thread as I was kind of in the middle of experimenting with cord cutting.
The main thing I'm having trouble with is the quality of the live streams. I'm used to the quality of picture and sound cable delivers. I've been doing A/B comparisons and cable keeps winning every time. Not sure if I can give that up.
I've been researching outside antennas again as I'd like to run an OTA signals to all the TV's using the existing cable run in the house. Just have to figure out how to do that.
Your mileage will verify with streaming. Using your existing cabling is pretty easy. just follow it back to the splitter and if needed replace it with a distribution amp. Hook your antenna to the input (of the splitter or amp) and you are good to go.