I will agree that both seats are basic seats and not the greatest.
I to have had back issues since driving our motorhome.
The only really good replacements are spending $1,400 to $1,600 each for some good Flexsteel captain chairs. I suspect the chairs installed and being both 6 way electric and electric lumbar is nice.
$2,800 to $3,200 for two captains chairs.
If you are even in the area of New Paris Indiana that is where you can find many dealers who may install them while you wait.
You can also buy from Camping World.
Let me know what you find out as I also may go for replacements.
Link to Flexsteel website
Flexsteel Furniture: Bucket Seats
They have 200, 400 and 500 series
The higher the series the more plush and costs.
I like the 559 model attached
Here is a link from a dealer so you can get an idea of the options and costs.
Flexsteel 559 BUSR Captains Chair, Glastop Inc.
I also found the Flexsteel RV catalog for your to get more informations.
See attachment below picture