Edelman graded out at the 3rd highest slot receiver this year behind Baldwin and Fitzgerald. However, Edelman had significantly more yards after the catch than Fitz (5.2 vs 4.3) and Fitz' performance went down in the last 5 games. Baldwin came out of nowhere while Edelman has been doing this for years. He pretty much single-handedly won the Pats the last Super Bowl because Seattle's Legion of Boom couldn't cover him. Before the start of the year,
nfl.com had Cobb and E.Sanders ahead of Edelman in their slot rankings. Edelman smoked Cobb (who couldn't get separation from defenders) this year and was better than Sanders as well. He is consistently in the top 3 year after year regardless of who's on the outside for NE so he is the best slot receiver in the NFL. If Baldwin can continue his dominance through the postseason and almost single-handedly win the Seahawks the Super Bowl and continue this high level into Fall 2016, I'll reconsider. Really the only thing Edelman didn't consistently do was run block at a high level and he had a bunch of drops (most likely due to his crooked finger after the Indy game) or he'd definitely be ahead of Fitz. I expect Edelman to dominate Peters in nickel, and would be surprised if Parker can even contain Amendola in the slot in base formations.
Regarding mismatches, funny that you bring up Denver/Miami/NYJ. Denver sacked Brady 3 times in the snow (which actually favors the offense, not the D) and Miami sacked him twice and knocked him down 8 times with both teams winning. NYJets took out NE in their 2nd game and sacked him twice with 1 pick. You can't just chip a mismatch all game, eventually those mismatches will add up and they WILL get to Brady. Like I said, it's not a matter of if, but when. For example, look at the analysis of what Oliver Vernon did to the Pats to prevent them from getting the #1 seed: