The back is ugly imo. It supposed to be a style nod back to the Suzuki Whizzkid. I'm not sure why as this was hardly a classic design, and it's rear was a bit of kludge necessitated by the rear engine. Putting it on a car which is supposed to have mini-SUV looks and the result is weird. But at least it's distinctive.
I do question Fiat's decision to drop the Panda Trekking at a time when other manufacturers are jacking up small hatches, adding skid plates and roof bars to give their cars that rugged look. (e.g. Ford's 2017 Fiesta, Dacia Sandero Stepway, Opel Karl (Viva) Rocks). 90% of these have no special off road ability beyond a few mm more ground clearance - and yet they sell. In the larger classes Crossovers are displacing MPVs and most sold are 2wd, as I'm willing to bet most Ignises will be.
Fiat are swimming against that trend. The discontinued Trekking may have looked expensive against the Ignis, but that was because of the TwinAir or Multijet premium. A 1.2l Trekking would have been competitive.