It's times like this where I find NDAs especially annoying because while I get it in a general sense, unless Cover were literally selling puppies to Chinese meat farms to fund their operations it'd probably cause less drama if he were able to just state the facts in full, rather than having to skirt around particular details. I fucking hate vagueposting but at the same time I can't be entirely mad at Lando for wanting to say something, since there are a decent chunk of people who saw the (also vague) graduation notice and assumed the worst. Maybe he and Vesper were acting like menhera women, but maybe they genuinely were assigned particularly bad managers and had a worse experience because of it. We'll never know.
Transparency (in earnest, not le meme PR sense) over graduations/terminations is a damned if you do, damned if you don't situation for both parties. If the reasons for leaving are disclosed then it's a one-sided account which can be picked apart and spun uncharitably against either the corpo or talent, but a generic, professional notice just allows the most sensational rrat to become the accepted canon version of events within certain portions of the audience, essentially defaming someone by omission.