These are mostly Mods that deal with combos or heavy attacks, since Companions do not have these features as well as other certain outliers. There’s also some ‘invisible gear hopping’ where if you put Mods on your Deconstructor (or Prime), the carry over to your Melee which is a many-year-old oversight we’ve lived with, but are approaching changes more thoroughly with this Update and as a result we’re patching up this behaviour. While reviewing these Companion Weapons, we noticed the Helios-old problem that there’s a lot of Melee Mods that you can equip, but don’t really function on companion Melee.
The Sisters of Parvos update will bring three new Modular Hound Companions, each with a unique Melee weapon.