It's always going to be a delicate balancing act when you are trying to run 3 different models from 3 makers in the same class. Having said that, VW manage to sell the Golf, A3, Leon and Octavia quite successfully. Auto Express seemed to think Lancia's entrant in the GP floorpan family would be the Fulvia we've seen as a concept. Maybe that's the best route to take. If they can make the MiTo exclusive enough then they can keep the supply and demand balance right then it will do very well.
As for the looks, personally I think it looks distinctive and pretty damn sexy. I would be interested to see if we get a family like the Alfasud, 3-dr. 5-dr. and Sprint coupe.