The objectivity of Credit Suisse is in question here, being a Swiss Bank and Novartis being a Swiss pharma.
Novartis is an ethically challenged company, currently being sued by the Federal Government on multiple fraud counts, as well state government fraud charges, facing $Billions in fines. This is on top of other huge fraud cases they have settled recently. It is no secret Novartis is being greatly pressured by its competition, noteworthy that Ariad is attacking and eroding possibly their most profitable BCR-ABL franchise.
It is entirely possible that NVS called in a favor here. The fraud Favus approach worked before, creating confusion in the market by lying about Iclusig SE. Now confusion via another 'proprietary survey' on adoption (CS knows better than to attack the drug itself).
So the CS folks are bailing, some confusion pumped into the market. Mission accomplished. The data won't lie though, in a few months this report will be long forgotten and we will recover until NVS does something else unethical. They have a strong track record of kickbacks and other illegal activities, which they use to protect their $Billions in profits.
Ariad is in a brutally competitive market, with unethical competitors. Part of the territory.