Speaking from experience after owning my first FCA product, I'll say that they are feature loaded, and on the surface, they are very nice. They still got some ways to go.
Sorry I cannot speak about EcoDiesel, but I'll provide my feedback on the truck I owned with the V8 Hemi if that's ok with you. My background, I owned a '14 RAM 1500 4x4 5.7 Hemi V8 (trim: Laramie) in Granite Crystal Metallic for 13k miles + 1 year, and it was bought new. At the time when I bought the truck, FCA was doing some massive promos so I got the truck for 10K off sticker with little/no haggling, that should've been a red flag there. LOL!
In any case, my truck had 3 safety recalls on it, 1 being the Uconnect system. Rather than write out a long reply. Here's my TLDR:
Pros:
-Nice interior with soft touch material everywhere
-Laramie trim (which is not even top-level) gets you everything you could ever possibly need and then some. My truck had cooled/heated fr seats and heated rr seats, heated steering wheel, full leather interior, fr/rr parking sensors, Nav, Auto climate, power moonroof, power adjustable pedals, memory seats, list goes on and on. I mean it was loaded.
-Hemi V8 is rock solid and so is the 8spd auto
-Avg'd 17-18 MPG with my truck with mostly CITY driving and some highway
-Uconnect (outside of the Nav, more on that on Cons) is very responsive and easy to use
-Very quiet, smooth ride
-Received lots of compliments about the interior
Cons
-FCA still has QC issues. These trucks are assembled in Mexico last I checked. If you frequent the RAM forums, QC issues abound. Some as even as bad as mis-aligned/mis-installed truck beds! I couldn't find any outstanding issues with my vehicle.
-Interior rattles!!!! If you're overly sensitive to noises your vehicle makes (I am), look elsewhere! I had a dash rattle which dealer could not resolve, I did it myself. Also, my brake pedal also rattled over bumps. Power-sliding rear window also rattled when in opened. Ugh.
-Uconnect Nav/GPS is horrible! It's slow, and it will take you on some really bad routes. Most of time, I ended up having to use GMaps any way.
-Oil filter location. If you do your own maintenance, changing the oil filter is a HUGE PITA on the Hemi's on these trucks.
-Leather quality on the front seats. I only had 13k miles on mine, and I noticed that the stitching on the driver seats was getting worn already. Warranty would've covered it.
-Map/console light already went out 2 mos after owning the vehicle, and since it is a soldered on LED system, the dealer has to replace the whole upper console. WTF. If you search the forums, this is apparently a widespread issue on the '14 models. Bad batch of parts?
-Dealers... I went to 2 Dodge/RAM dealers for my issues, and neither really seemed overly concerned or wanting to resolve the issues I was having. 1 dealer even nicked the paint on my truck during their possession. Also, the service waiting area felt like I was surrounded by "people of walmart".
-SLOW acceleration. My truck had the 3.21 gears which I'm sure is attributed to the better than expected mpg my truck returned, but man it was a pig. 400 lb/ft torque doesn't move 6000 lb very fast esp with 3.21 gears behind it. For reference, my 2010 Tundra 4x2, 6 spd auto and the small block 4.6L V8 felt a lot faster, but it had 4.10 gears in it courtesy of the tow package.
I sold the truck, and went back to a car.

Much happier, for now...