The Pats are a Harris fumble from being 2-0, and 2-0 in the division. Mac Jones is completing 74% of his passes and hasn't turned it over once in two games despite a ton of blitzing coming his way.
Compare Jones to the other rookie QBs so far:
Jones: 51-69, 73.9%, 6.8 y/a, 1 td, 0 int, 96.7 rating
Lawrence: 42-84, 50.0%, 5.4 y/a, 4 td, 5 int, 57.1 rating
Wilson: 39-70, 55.7%, 6.7 y/a, 2 td, 5 int, 56.1 rating
Lance: has thrown just one pass (but for a TD!)
Fields: 8-15, 53.3%, 4.7 y/a, 0 td, 1 int, 38.2 rating
Playing QB as a rookie is REALLY hard in the NFL. And Mac Jones is, so far, blowing away the other rookies in his performance. Simply taking care of the football alone has been crucially important, and I'm sure that BB has pounded it into his head that this is job #1 for a QB. And that's exactly what Mac has been doing. Take what the defense gives you, take care of the ball, kick field goals if you need to, but just don't turn it over.
He's had two games. The downfield stuff will come. And let's be honest...when he HAS gone downfield, the results have been there. He's made good throws.