I had an 01 1500 with the Hemi that had the fuel pump go out and the exhaust leak. It went 230,000 miles before the pump went out but I think those issues are "pre RAM" problems. I haven't heard of many actual complaints from real people I know that have the V6 models yet from the 2018 and above models. Wife's old Grand Caravan had the Charger V6 in it and it would flat out go and we had no issues in the 2.5 years of ownership with it either (engine wise anyways).
In terms of standard truck size, it's actually bigger than Ford F150s, but I would never drive a 2500 or 250 and higher model truck. In fact, if it wasn't for the wife and kids I'd have a standard cab for the truck to be a bit smaller. The biggest I'd go is a Rebel or Raptor, but prices are insane right now so I'm waiting it out with this and since I haven't had a truck in 12 years it's nice to sit higher than everybody again. I just can't drive it worth a shit anymore because I'm so used to the Mustang's size.
Tbf the weight plays a big part in it. It has a higher gear ratio in the rear than my Mustang which has less HP but it goes off the line way quicker because of the weight. With how stupid some people here drive being able to dash across a street or get on the highway really quickly is pretty important.
Also diesel motors usually make up for HP numbers with high torque so it works out way better for city driving. For instance I believe your 170hp will be almost 300 in torque which is more than the V8 in my Mustang.