I'm going to nominate Sawk back up to C+. Quoting my post from RU viability ranking 1 as it's still relevant:
"I think Sawk should be put on the list. Sawk, choice banded Sawk in particular, is a massive threat to a lot of RU teams. Sawk has the capability to OHKO almost every offensive threat in the tier, and boasts decent speed as well. Hitting a nice 383 attack, Sawk is a powerhouse. Another thing benefiting Sawk is its abilities-- sturdy and mold breaker. With sturdy, Sawk can live any hit, such as from Delphox, Braviary, or Sigilyph, and OHKO in return. With mold breaker, Sawk can bypass Weezing, which is its primary counter. Sawk's power rivals Hitmonlee, only doing about 5-10% less than lee's HJK. Although Hitmonlee seems superior, Sawk has its merit in comparison to hitmonlee. For one, the extra power on knock off is pretty noticable. As Sawk has a higher attack stat than Hitmonlee, and will be running a choice band rather than a life orb, it's able to gets 2hkos where Hitmonlee can't, primary examples being Doublade and Cofagrigus, both of which Sawk 2hko's most of the time, and Hitmonlee can't. Also, Sawk has ice punch to neuter Gligar, debatably the best Hitmonlee counter in the tier. Although Hitmonlee has a clear niche superior to Sawk's, namely rapid spin and mach punch, I think Sawk fits a unique role on teams. It's able to break walls effectively with perfect coverage (close combat, knock off, ice punch, eq/poison jab), its speed stat is pretty good for RU, and its ability lets it live any single hit. For these reasons, I think Sawk should be at least a B- rank pokemon."
Also, something I didn't mention, Sawk has merit over gallade as well. Although they have the same base attack and movepool (not sure if gallade gets pjab, it should be running zen anyway), Sawk has more speed, 2 better potential abilities, and better defensive typing. Pure fighting is a little more useful than psychic-fighting mainly because Gallade is such huge spiritomb-bate, and a blackglasses pursuit on the switch can easily do 70-ish percent. A shadow sneak also does near the same. Sawk, on the other hand, is neutral to ghost and resists dark. As for sturdy and mold breaker, both can be useful whereas justified is rarely helpful on a pokemon with piss defense in a knock-off infested tier.
Tl;dr: Sawk is a massive powerhouse, base 125 attack choice banded cc basically neuters everything. In comparison to hitmonlee who is mostly better, sawk has almost the same power, and added power to 2hko doublade and cofagrigus, which hitmonlee cant. It also has access to poison jab and ice punch to beat hitmonlee's two common counters: aromatisse and gligar. Sawk may suffer as being partially outclassed by hitmonlee, but I think that its niche as an offensive fighting type make it worthy of a higher rank (low B or higher C rank)