Halving barrage delay would probably hit weapon teams hard while reverting nerfs will hit blobs hard.... quite easy to choose from my perspective.
I kind of remember katyushas wiping a lot with the individual rockets. Not saying I agree with a the nerf, but i disliked the squad wiping. Thats why I'm more leaning towards the barrage delay decrease, as its just silly to be there in first place now that its been nerfed down. Would make unit more aesthetic too. But thats just my opinion.