You've posted this repeatedly but what makes you think only Ferrari was behind the engine change? FYI, the 4 cylinder turbo was proposed because that's what VW/Audi wanted:
Do you have a source on this manipulation? You realize any changes to the rules need approval from all teams? If Ferrari AND Mercedes really had their way they would still be using V8s.
Where did I say 'only' Ferrari was behind the push for the V6? I just wanted to make clear they made a lot of noise how they didnt want the v4 but where very happy to have a V6. ""The choice of having a V6 turbo engine from 2014 is the right one and I am pleased to note that common sense prevailed,"
Then later, at the end of 2012 Montezemolo for some reason backed down, and indeed, thought it was wiser to keep the V8's but initial he was happy as a puppy with the V6. Rumours surfaced Ferrari had problems in design and fuel usage with the new engine in 2013. The exact same ones we hear and read today.
Its ironic you posted a link to that article wich states that Renault pushed for a new engine format, and pushed hard for a V4 and if not theyd pull out of F1, under a link of an article were Newey said hed rather have a V6. The original objections of Montezemolo were the opposite, and he threatened to leave F1 if no V6.
Its was and is a right old mess.
To stick with the topic: its this changing attitude towards new regulations wich is part of Ferrari's problem. They signed up and agreed the new engine rules, and then backed down 2 years later. They got their delay of introducing those engines to 2014 and still they couldnt manage it right.
I really struggle to believe this would have happened under Todt. He would either not agree with the new rules, or make sure the structure was in place to design and build a competitive V6 that would work from day one. Todt and MOntezemolo might not have been the best of friends, they were on the same page were it concerned Ferraris future and politics.
I sometimes get the feeling that Domenicali doesnt have much to say in what Montezemolo wants, is not clear enough what his factory is capable of and what not, or that Ferrari is ready for rule changes.