Weezing will definetely see some more usage with the viability of defensive teams going up but it might have to change up it's set depending on how the meta shapes itself. Life Orb Leaf storm from Scpetile does over half to weezing so Mixed Wall or SPdef Weezing might become a thing with Pain Split being used over Tspikes or Taunt to help check Sceptile and other Special and Physical attackers throughout the match because Weezing can afford to because of his high natural def. However with the potential rise of Weezing, he still has to worry about MB Pinsir who can run earthquake to deal with Bulky poisons and steels like Garb, Weezing, Steelix if you can nail them on the switch.B+ => A-
There's been a ton of buzz about Weezing recently and it's more than justified, as it's a fantastic anti-meta defensive pivot at the moment, stopping the new Steelix / Sceptile / Pinsir in their tracks with its standard physically defensive spread while still dealing with old threats such as Sawk / Rhydon / Hariyama / Piloswine. Upon switching in, Weezing can spread Burns around the opponent's team, use Sludge Bomb to inflict reasonable damage (and potentially punish switch-ins with Poison), use Pain Split to get some health back later in the game, or set-up Toxic Spikes for its teammates to abuse. Flamethrower also ensures it isn't dead weight against Steels after it Burns them. It can even run Memento to help a sweeper set up once its health is depleted, while Clear Smog and Haze can be used to deter opposing setup sweepers. Especially in the early game, Weezing can consistently switch in to threatening attackers without being too passive, due to its variety of offensive/disruptive options. Black Sludge is the best item in general as it provides more recovery and punishes Trick users, but Rocky Helmet is also good for really stacking up residual damage, as Weezing will switch into contact attacks most of the time. While its lack of reliable recovery and mediocre special bulk are drawbacks, Mega-Audino is a fantastic partner that can deal with both of these problems on both defensive and balanced teams at very little opportunity cost, and Weezing's superb matchup against the metagame in general at this point makes it worthy of A-, in my opinion.
252 Atk Life Orb Mold Breaker Pinsir Earthquake vs. 252 HP / 252+ Def Weezing: 177-208 (52.9 - 62.2%) -- guaranteed 2HKO after Black Sludge recovery
Also I agree with
Though alot of people think Pilo has too many common weakness, is slow, weak to Knock off and only resists Poison, Ice and immune to Electric it is still a fantastic offensive rocker that is incredibly hard to switch into its dual stabs and is incredibulky with eviolite. The top 3 new drops are all weak to it's stabs and Swellow rising to deal with Sceptile also makes its priority Ice Shard to dent Sceptile, Swellow and Altaria very nice.
However with Steelix becoming a popular offensive rocker Pilo might face comepition in that role. Pilo cant reliably 2hko steelix especially if it runs impish (then its a 3hko after lefties) and Steelix can 2hko with heavy slam with just 128 atk evs.
Even though both of them have similar roles and deciding on what ground type offensive rocker you wish to put on your team, the fact that offensive ice types such as Jynx might see a rise (especially a scarf set that could surprise the sceptiles and swellows) this makes Piloswine even more useful in this meta due to thick fat.