Free.
Not just with closing time. Don't frame it that way. I don't care about usage. You know they are free. Some people just have common decency and etiquette and don't want their wins to come from having a fusion plastered to their hand.
Make them projectile and not hitscan if you cannot always sync the sound of it charging with what's actually happening in game.
For every reason you offered for nerfing shotguns outside of usage, you ignore that on fusions.
Edit
What other special can be used exclusively as your primary other than Forerunner and Fusions? Why when it was a problem for shotties and that side arm something needed to be done, but it's fine for fusions?
-
The faster shooting ones just have no downside. The range difference from Zealots to Glacioclasm, for example, is pitiful at the cost of nearly 2x the charge time. I think Precisions and High Impacts are more or less fair given you can react to the audio cues but Adaptives and Rapid Fires are just uncounterable. I think D1’s projectile fusions were way more balanced and had a higher amount of skill expression, but I know many people will dislike the idea that fusions would then have much crazier theoretical range even if most players would not be able to consistently hit them.