I’m a longtime Plex user that bought a lifetime pass in 2009. I’ve incorporated OTA with an HDhomerun. I find that the new appleTV client has lost some functionality that I used every day:
The old client let you select OTA only / Plex channels only / merged
Favorites could be managed in one place
Category filtering worked across the combined guide
The redesign now requires switching between separate Live TV areas
This adds friction for users who actually use both Plex FAST channels and a local tuner
I hope that some or all of these features will make it into the new client.
It seems there are already a few suggestions addressing what you’re asking for.
Please comment/vote in those suggestions to help us avoid distracting or cannibalizing votes.
Unless I’m missing some unique aspect of your suggestion, I’ll close this thread a a duplicate.