We all have our preferences. But I'm not sure if all of your points stand. We all agree on the 319 interior being awful. I understand the noise question to a certain extent. The LEAP1B is definitely quieter than the CFM-56-5 on the A319. However, there is, IMHO, more aerodynamic noise penetrating the cabin in the 737. But still, the 7M8 feels quieter than a CFM powered 319 to me as well. But the other feelings? The cabin pressure is the same. Feeling on the takeoff? Well, yes. If a 738/7M8 would use the same rotation angle as the 319, it would drag its tail halfway down the runway. So indeed, the TO feels smoother. That said, I lake the 319 "sporty" takeoffs. And climbs, as the 319 has a lot of wing for the 64t MTOW. As for landings, the 738-7M8 are known for higher landing speeds. So the braking on ground is harder. The A319 landing feels definitely smoother.
I guess there is one more important point working for the 7M8. I'd expect a 7 year old 737 (and these are the oldest examples) to be way more reliable than a 23+ years old 319. So perhaps less IROPS caused by the aircraft?