The big issue with this era of Patriots drafting is the lack of any S-tier talent, the true gamechanging guys who sit around for 10 years and serve as your true blue chip moneymakers. But even A-tier talent isn't really there either.
In the early part of the dynasty you had Brady, Seymour, and Wilfork in that S tier with some legitimate solid A+ guys and As like Samuel, Faulk, Warren, Light, Branch, Givens, and Wilson.
In the next era, starting in 2005 and ending in 2009, your S-tier talents are Slater and Edelman but neither showed up until the end (and his talent doesn't emerge until the next era anyways). It's a pretty weak era for drafting, with Mankins, Mayo, Vollmer, and Gostkowski as the only A level guys. Chung's a weird border case because his career's an A but he had to leave and come back to realize it.
Then you have the next five years, with Gronk as the obvious S-tier. Hernandez probably deserves a mention in that tier (or at least an A+) as well for the period of time he played. McCourty, White, Mason, and Hightower are also an A+, and Flowers (left after rookie contract), Solder, Ebner, Harmon, Ryan, and Cannon were solid As. (Chandler Jones is a weird case as well, an A+ career but more like a B for the Patriots given draft position and return.)
In the current era, Thuney is an A but the fact he probably won't stick around after his rookie contract prevents a higher grade. And he's a guard, probably the most replaceable position in football, where the difference between an All Pro and a solid guy is pretty small in terms of outcomes. Wynn has the potential to be an A+ or A player. Maybe Bentley if he continues an upward trajectory. Otherwise, yeah, everyone else to this point is either too soon to call (anyone drafted in the last couple seasons) or a B type at best (think Roberts or Karras, tough to argue with getting a solid player in the 6th round but both are at best a replacement-level starter).