Given their experience with Bradford's failure to grasp and execute his offense and Goff's similar pro style experience deficiencies. Not sure I'd want to gamble even more with deja vu with our first overall pick "franchise" QB by bringing McDanniels in for a second time for the second NFL season of Goff like they did Bradford. I'm one that prefers to learn from those lessons of the past rather than repeat the same mistakes.
That said, I think Goff might be better suited from a skillset and mentality perspective for McD's system than Bradford was, but I still would be reluctant to risk it. I think they'd be better off with somebody who has a more proven track record of adapting scheme to the player than what the Patriots tend to do, which is find players that fit the scheme. McD did very well with Kyle Orton in Denver, an experienced pro style QB all the way back to his college days, and did not do so well with Tim Tebow, a young and very not pro style QB. I don't have great confidence McD would be up to the Goff development challenge.