In 2011, the Mopar vans got the well respected 3.6L engine. The same, nearly 300 hp V6 that Mopar puts in EVERYTHING (Chrysler 300/Charger/Challenger, Ram 1500 truck/Promaster Van, Wrangler/Grand Cherokee and more.)
In 2014 the Mopar vans got bigger front brakes.
From 2014 to 2020 they just kept making the same van. Not much in the way of changes. I generally feels like they had a formula that worked and they just kept working it. They kept working it even though the Pacifica came out in 2017 and was supposed to replace the Grand Caravan. They kept the GC going for another 3 years.
Somewhere in the earlier posts you mentioned that your wife finds the GC seats uncomfortable. If that comment is about the 2rd row seats...I agree. In order to accommodate the stow-n-go folding seats there are some compromises. I find these 2rd row seats comfortable like good patio furniture (made to fold and store) but not comfortable like good living room furniture. For me, these 2nd row seats are most likely to be filled with kids in car seats. Since they are sitting in the car seat, or booster seat, these kids wont really notice the faults of the seats. The same booster seat pretty much feels the same in any car. It is the adults who might feel the compromises.
In the early years of this version of GC, Mopar offered a fixed, not folding seat. This offering was more "living room like". But, the stow n go was Mopars big differentiator, so it eventually became that everything offered stow n go. But...
VW rebadged the Mopar van as the Routon. Not wanting to give away all the differentiators, the Routon never offered stow n go. It only came with some fixed buckets. However, you can retro fit stow n gos into a Routon and you can retro fit Routon fixed buckets into a GC.
This picture found on car-part.com of a Routon in Sterling Heights, MI asking $114 per seat for these leather Routon seats.
For comparison, here is a typical stow n go seat:
Notice the flat, unbolstered, odd, seat bottom as well as the much thinner and shorter seat back.
Also, lesser model GCs offered a 2nd row bench which seats 2. I don't find that seat to be all that comfortable but it too can be retro fitted into a Stow n go equipped GC.
All this talk of the 2nd row seats, I think it should be noted that I find the front row seats of the CG to be very good. The Routon and GC have the same front row seats. These Routon 2nd row seats seem to generally be front row seats added to the 2nd row. All have the same 3rd row.