I think Dugtrio should fall to at least B+.
First, Dugtrio didn't gain much from ORAS, having another prey (Mega Camerupt) is about it, well and his other prey, Dragalge, being more used now makes Dugtrio's ability to trap & revenge kill it more imporant. However, it lost a lot of things, Registeel is not as common as it used to be, while on the other hand, Cresselia and Bronzong are as popular as ever and Dugtrio can't do shit back. Gligar is seeing even more popularity so that's another minus. As for the new megas (Aside from Mega Camerupt), Dugtrio pretty much hates all of them, from Mega Sceptile, Mega Pidgeot and Mega Sharpedo (At +1) who can outspeed all day and OHKO to Mega Glalie and Mega Sharpedo (If at +0) who can just kill it with priority Ice Shard or Aqua Jet. Scarf Moltres is also a bane, while regular can just switch out of Rock Slide / Stone Edge.
The lack of power is also a thing, being unable to even 2HKO pokemon like Cobalion (Only has a small chance if banded) and Doublade is just really a shame. While Pangoro, Slowking, and Escalavier are roaming around RU and Dugtrio can barely 2HKO with a CB, meaning it most likely cannot revenge kill those Pokemons even if weakened.
First, Dugtrio didn't gain much from ORAS, having another prey (Mega Camerupt) is about it, well and his other prey, Dragalge, being more used now makes Dugtrio's ability to trap & revenge kill it more imporant. However, it lost a lot of things, Registeel is not as common as it used to be, while on the other hand, Cresselia and Bronzong are as popular as ever and Dugtrio can't do shit back. Gligar is seeing even more popularity so that's another minus. As for the new megas (Aside from Mega Camerupt), Dugtrio pretty much hates all of them, from Mega Sceptile, Mega Pidgeot and Mega Sharpedo (At +1) who can outspeed all day and OHKO to Mega Glalie and Mega Sharpedo (If at +0) who can just kill it with priority Ice Shard or Aqua Jet. Scarf Moltres is also a bane, while regular can just switch out of Rock Slide / Stone Edge.
The lack of power is also a thing, being unable to even 2HKO pokemon like Cobalion (Only has a small chance if banded) and Doublade is just really a shame. While Pangoro, Slowking, and Escalavier are roaming around RU and Dugtrio can barely 2HKO with a CB, meaning it most likely cannot revenge kill those Pokemons even if weakened.