But he did sign the Articles in 1571, allowing for his appointment to Salisbury. The key thing about his statement regarding the cope is, of course, it cannot at all be reconciled with certain interpretations of his eucharistic views.
He, as a historic figure, is a desperate gambit by Anglo-Catholics to subvert our historic Eucharistology and the gambit fails in multiple ways. Even if he, as an individual, was a private crypto-Lutheran, it wouldn't actually matter.
Yes, he was willing to submit to the authority of the Crown on this issue despite his privately held belief between 1563 and 1571. People change and learn. Many people love to quote a single paragraph from Cosin in his 20s and ignore his seminal book on the Eucharist decades later. Lol