Real quick before we move on to the next two...
Skankovich it's arguable that carbink outclasses Bronzong as a dedicated Trick Room lead. They both are slow with Trick Room, Explosion, and Stealth Rock. Carbink trades a slightly more reliable stab in Moonblast for Gyro Ball's variable power, and its Explosion is weaker, but its typing is much more useful defensively. Most importantly its access to Sturdy means that it will always get TR off no matter what.
On to the new drops.
Chandelure B+ --> A- In many ways, Chandelure still faces the same challenges that kept it back earlier this gen from being the powerhouse it was last gen. These problems still remain, but the new drops made it far more viable. Infernape is probably the most important - the incredibly threatening NP Infernape (unless HP Ground, which only I run) is hard walled by Chandelures of all types, making it extremely useful defensively - especially as Chandelure has few switchins, so getting it in for free on a threat is worth double. Lucario is also worth mentioning, as Chandelure is impervious to its priority, so a scarf Chandelure can easily threaten out Lucario. Scarf Chandelure actually beats Alakazam in all scenarios as well - Sash Shadow Ball doesn't OHKO it. Perhaps most importantly, Blissey is the perfect set-up bait for Chandelure's SubCM set, which takes nothing from Seismic Toss and can dodge status with Substitute. Chandelure certainly hasn't returned to its former glory, but the new drops ratcheted up its viability significantly.
Chesnaught B+ --> B Chesnaught, on the other hand, isn't really fit for this meta. With all the boosting sweepers around, it becomes increasingly easier to punish stray Spiky Shields - and Chesnaught finds fewer opportunities to come in. Spikestacking really isn't that desirable at the minute, and while it's a decent switch-in to blissey it's not really offensively threatening enough to dissuade defoggers from just switching straight into it and removing all of its work.