The Patriots had a very good offense last year despite two of their three or four top weapons missing most of the season.
There's no such thing as Gronk insurance. He's a singular player. You can't build a team assuming that arguably your best player gets hurt. Dustin Keller, if fully healthy, is a better player than any of the tight ends available in the 2nd round of this year's draft.
The two tight end scheme was an accident more than a design, the result of drafting two exceptionally talented players at one position in the greatest tight end draft of all-time. Unfortunately, one happened to be a murderous sociopath. He and Wes Welker, who were essentially dual slot receivers, have been replaced by Danny Amendola and Julian Edelman. Yes, those guys are much smaller than Hernandez, but they're filling the same role in the passing game (Kevin Faulk, pre-Hernandez, filled a somewhat similar role).
Hopefully the injury bug won't bite this year. Often, winning in the NFL is a result more of who's the healthiest than who's the best on opening day. And that's almost entirely due to luck.
I think concentrating on defense and the offensive line was exactly what the Patriots needed to do. Keeping Brady upright is more important than giving him another young question mark as a receiver. Also, the positions drafted this year are all those where guys can actually come in and start. I don't know next to anything about the guys who were drafted, but I'm happy with Easley and optimistic about the rest of them. Spray and pray with a bunch of picks is, on average, a more effective draft strategy than picking up a bunch of marquee names.
I'm ambivalent about the Garropolo pick. I haven't watched him play and I doubt any faux-scouts on this board have either. From reading about him, he seems to have a ton of talent and he's in a good situation to develop his talent, and Mallett will be gone next year so this was the year to grab a backup to Brady. I think we're still a few years away from worrying about Brady's heir apparent, but you never know - one freak injury is all it takes.