My Ram rode much more stiff/harsh for the first couple weeks. I'm not sure if that was the coils wearing in a bit or me just getting used to it. Even when new it was still better than the leafs off my 06 Chevy 2500. A better ride in a 350/3500 is really surprising but I know they are always talking about improvements in the leafs and mine were almost 10 year old technology.
A couple things from the Ford champion a few posts back. 6.2 w/o cylinder deactivation gets better mpg than the Hemi with it? Good luck with that. I poured over message boards with real world experiences for weeks before I purchased and the Fords were seeing 1-2 less consistently. I don't care enough to go research it again but I'd be interested to see what the test parameters were if the poster can back up that claim. If it's true I'm going to guess it's a very specialized test.
And, not all the Rams have air suspension - at least my 2014 doesn't. And to say the systems have problems is bit of a stretch. The systems being talked about haven't even been out for more than a year.