I traded off my 2017 LTZ two days ago on a 2020 RST with the 2.7 and so far I love it. I'm averaging about 20.5 or so through 200 miles. 70/30 hwy/city miles.
The torque is fantastic, It honestly feels quite a bit more responsive and zippy than my previous 5.3. That had the 8 speed and I noticed all of the shit people complained about, hard shifts, etc. It was never a big deal to me but it Doesn't seem to happen as much in the 2.7 albeit in a smaller sample size.
I tow a boat about 10 times a year, and that's the extent of it. Honestly anything over 7000lbs always gave me pause anyway in a half ton so I don't anticipate it being an issue. Frankly I tested the payload rating FAR more in my old trucks hauling wood and cement etc than I ever did the towing capacity that's actually a selling point for me on the 2.7l.
Someone posted earlier about how it just drives really nice and just kind of floats from point A to point B. Couldn't agree more so far.