Are fusion levels likely to return?
Right now I'm afraid to level up some of my weapons as I'm worried I might wake up the next day with a level 19 mech, while it's a level 16 now I've nearly finished fusing the last of my items that wouldn't raise my level when there were fusion levels, and I'm afraid to start fusion with my other weapons

i feel you they are so inconsistant with this that i dont even fuse anymore