I do not believe so. Though bungie acted like it was a bug, they were clearly removed intentionally and likely, permanently. Think about the areas where the packs of wolves prowl. These areas all used to have blades of crota. It is VERY likely they removed the blades so the events wouldn't happen at the same time. Think about how easy it would be to wipe out a wolf pack with a blade. They shouldn't have COMPLETELY removed them, but I get it. (ALSO, this probably means in the years to come, these wolf packs will no longer prowl.)