I have the same setup as you and have thought about the same question.
Aside from sports, I don't watch that much TV except for some shows from some of the streaming platforms like Netflix. If it was just me, I wouldn't have Channels.
The reason I got Channels a few years ago is because I bought an HDHomeRun box because there weren't any streaming options that carried local TV channels and I wanted to dump DirecTV. That has changed now however my wife who does watch TV likes the Channels UI much better than YouTube (actually she hates YouTube) so I have kept my Channels subscription. Commercial skipping is also a big plus.
The only issue I've had with Channels is Authentication with TVE sometimes breaks and when this happens, a cryptic error message will pop up on the TV. So far Channels has worked through the issues but its likely to break again so I would not recommend TVE to someone that is clueless about how Channels work.
I should also mention one other benefit of Channels. My wife occasionally travels out of state and is able to watch TV on her iPad same as home. No YouTube checking for location, etc. You can work around location with a VPN but watching Channels remotely works pretty well.