In the latest Dev Update (covered here), Eric Williamson announced that the Smoke Grenade would be put into the vault in next week’s patch, v3.3.0.
It seems reasonable to assume that Epic wouldn’t outright remove the Smoke Grenade without a decent alternative and with the leaks yesterday, we know a new ‘Stink Bomb’ item has been added to the game which could serve as as a replacement.
The current description for this item according to Storm Shield One is “Hurls a grenade that unleashes a cloud of poison. Better clear out!” which suggests that it is essentially a Smoke Grenade which also damages your opponents, making the original redundant.
Interested in other items that might be coming soon? Check out this post.