Surely cheaper to drop a few and just let them go. Do they make them in the same factories, overheads, extra design work?. Even if they have to stamp slightly different panels, that is more cost than making more of the same model. Anyway, modern cars are loosing their uniqueness as it does not sell as easily, so just drop them.The combined company will have sales of around 9 million units, not too far behind Toyota.
Many US customers do not realize that most Jeeps are now built on FIAT or Alfa Romeo platforms. Ironic that FCA tried to build a Dodge badged as a Lancia, now that was boneheaded stuff.
There should be no difficulty rationalizing platforms and powertrains while preserving the different Marques being brought under the same corporate umbrella.
Example: If I went to a FIAT and an Alfa Romeo dealership and test drove 2 cars with all badges removed, and I had never seen them before, would I be able to work out which was the Alfa and which was the FIAT. I bet not any more ... and Joe Bloggs really does NOT care. Just make the FIAT but stick Alfa Romeo badges on it, or make the Peugeot and stick a Citroen badge on it, etc.
All those brands (14) selling less volume than ONE brand in Toyota ... imagine the cost differences for components. Toyota will of course share some parts across their models, so the cost savings are enormous, meaning more profit => more R&D budget => next model keeps getting better than a FCA design.
The marketing campaign could be fantastic: "Instead of churning out the same old regurgitated stuff, we have pooled all our vast experience together from all our 14 brands and come up with 3 brands for the modern automotive market, that will produce the very best cars for all kinds of drivers"