They seem to have done an OK job to me. I personally think there wasn't much wrong with the exterior, so what they've done is very close to the point of being 'too much' - I would've preferred them to wait & only tweak the exterior appearance when they introduce an all-new car.
The things that needed the most attention were the sometimes harsh, bouncy ride, and the refinement. Sounds like refinement might be slightly improved from the extra soundproofing (similar tricks have worked very well on the Alfa Giulietta facelift so it might work on the 500). However it doesn't sound like the ride's going to be much different
I like that they've answered the criticism of the lack of glove box (hopefully that'll be on all models, not just higher specs like the Panda), and it's good to see a stereo which supports Bluetooth Audio Streaming & DAB, as the 500 was getting hopelessly behind rivals in that regard. However it looks a bit shabby that the UConnect is obviously only available in black, meaning there's a piecemeal black & ivory interior combo going-on. I also wonder how easy it'll be to use the touch screen on the move as the original stereo was quite a reach to adjust accurately in our 500, especially when on the move! Seat materials look nice & overall I think with the exception of the black stereo on ivory-trimmed models & slight mis-match of materials, the interior looks ok. It'll probably work better in all-black, rather than ivory.
Engines are just tweaked from what I can tell, and given Fiats recent track record this leaves me very nervous. They really need to close the gap in price from the 1.2 to the TwinAir 85, to encourage more people to try the TA, so will be interesting to see if that happens (I doubt it). I also hope the S model is returning, as it sells well in the UK & gives it appeal to a male audience that the other models don't have.
Overall they've done alright. I think it's overpriced & even the modest £200 increase in price is too much given the previous hikes. It really needs an all-new car to address the fundamental criticisms, but as a stop-gap for a couple of years they've done about as much as they needed to, short of spending mega bucks on what's essentially an old model on an even older platform. 6.5 out of 10!