I think this is just daft. They're much better now than they were when Arrivabene took over. This could set them back another couple of years. And for no reason. It's amazing how they've forgotten the lessons of the Todt-Brawn-Byrne era; stability brings success.
The perception that Ferrari is now much better than when Arrivabene took over is highly influenced by how bad Ferrari was in 2014, their worse year since the arrival of Michael Schumacher in 1996. That season was hampered by a subpar hybrid engine design (later improved), miles behind the Mercedes one and even behind the Renault. Other than this, the Domenicali period was at least as good as Arrivabene´s: Ferrari took the Championship to the wire in 2010 and 2012, they were genuinely as quick as Red Bull in 2011 the only day (British GP) the blowing exhaust were restricted and seemed on their way for a Championship challenge in 2013 before the tyres were changed. In 2009-2013 , they always won at least one race and often several races. Better than 2015-2018, IMO.