First, yeah we could lose game one against the Jets for the reason you list, BUT we are rolling out new changes on the offense and Defense they haven't seen either. You can bet the Farm McDermott is going to come with some funky stuff with this being his first game as DC and its on MNF.
I get the concerns, but I think we are better than last year to be honest. OL, TE and WR's 3-6 are upgraded. Dorsey is in his 2nd year and most likely will learn from his mistakes from last year. He also gets to roll out "His" offense. The Defense will be better just by subtraction of Frasier and his ultra conservative BS including playing DB's 9 yards off the ball on 3rd and short.
Lastly, the pressure if off. We are not favored to win the whole thing so just play freaking football. We lose 4-5 games its expected. We want homefield advantage but if we cant get it, at least get the first game at home and I feel we will do that. I still see 12-5 or 13-4 as our record and we win the division after splitting games with NYJ and Miami.