I think the Ferrari project failed due to many more reasons than just the aesthetic on the case but that's a different topic.
Agree it would be kool if OP are willing to take bold steps like Roger Dubuis. Having said that, looking at the track record of the brand, I'm just not that sure if Bonati would be ready to go that route.
As to your second question, I can't quite imagine Panerai w/ a dress watch case. In fact, I found the Radiomir to be reasonably dressy depending on the occassions. But if I have to guess, there're still some case designs from the vintage range which could potentially broaden their current offerings:
I for one would love to see a double crown guard submersible. Fits the DNA perfectly and the double crown config could be a platform for various added complication!
or maybe this prototipo?