I think these two are one of the most underused items in the game with following reasons: Their effects are insignificant if there’s too few equipped. Which leads to more slots to use, means less other equipments you could carry. And unlike other equipments which are mostly more = better, bringing too much spray condenser/expander can hurt weapons’ performance.
So, I guess it could be better (and appeal players to use it) by allowing to adjust it. You’re only required to bring one item per mission, and it’s adjustable before the mission starts. A preview screen to show how the weapon is affected could help and might be useful if other weapon modifying items are added.