Season 12 makes several balancing adjustments to Apex Legends' existing cast of playable characters. Most notably, Crypto is getting a good buff--starting in Season 12, the recon legend will be able to toss his drone in a straight line, allowing him to quickly scan in front of him or attach the drone to a wall as a stationary webcam. Caustic will also be getting an update in Season 12. The toxic trapper is getting a nerf--his traps will now be destructible, preventing the legend from using them as reliable cover.
In Season 12, the Alternator SMG is rotating out of Care Packages and the Volt SMG is rotating in. On top of this, the VK-47 Flatline and Longbow DMR are both being rotated into Replicators, with no way to loot these firearms save for finding them in an enemy's deathbox. You'll otherwise have to craft them with Materials in order to nab them.
In terms of hop-up attachments, Hammerpoint Rounds are returning. The hop-up will still go on the P2020 and Mozambique, but Season 12 changes the attachment so that it can be put onto the RE-45 Auto as well. Additionally, Shatter Caps are changing so that it's no longer a toggle--when attached, the 30-30 Repeater and Bocek Compound Bow will automatically switch to a shotgun-like bullet spread when firing from the hip. And finally, a new hop-up will be added in Season 12. Called Kinetic Feeder, the attachment can go on the Triple Take and Peacekeeper. It automatically reloads and starts focusing either weapon when you slide