Honestly the need a spread buff to make up for the target size difference in PvP. Fusions were beasts in the vanilla meta, but got nerfed because people got good with them. I think that an overall [b]minor[/b] buff to charge rate and spread reduction within 15-20 meters will leave them in a spot where they would be more useful than they are now while not being blatantly broken, like the adjustments made to AR's