Parasitic definitely has negative connotations. And the definition it does have doesn't seem entirely bad to me. I think it's fine that say, the Bozja systems don't interact with the rest of the game. It lets them experiment with other forms of content that won't have a huge impact on the main game, or have to be taken away from the main game like artifact weapons in Legion etc. I think it's ultimately a good thing, so long as the game's main system continues as well.