While the call to host switch is malicious, almost every developer in WordPress world will agree BlueHost, and their parent company with all their 50+ hosting companies, are utter garbage. The only reason they exist is because they have hired an army of bloggers and pay them affiliate income of $65 / signup.
As far as disabling Endurance Cache goes, it is completely legitimate. It's a plugin forced upon BlueHost users, without being told so, and is a "must-use" plugin that most users will never check (and can't be completely disabled from WordPress admin).