To get the original topic relevance out of the way, I spent about 7 years in the current GC platform, between an 09 and a 15. It is, really, no comparison, but that's all been vetted out here already. Yes it's cheaper, yes it's a stable platform, but they are galaxies apart.
As for the seats, I am one of those who laments the current firm seating trend too. The Pac is comfortable to be sure, but I would definitely go softer if I could. Fortunately it is the wife's main driver; mine is a 22 year old conversion van that is like driving around in a big squooshy recliner so I get my comfort fix.
'18 Pacifica LTD, GCM