Negative fusions (Fusions that work against the gun) and fusion discoveries in general

So, with all kinds of fusions floating around, what do you think is a bad fusion for a specific gun? Do you think there are some fusions that work against the gun rather than for it? Have you noticed any neat things about any specific fusions?

I think that the current mini pass Swarm is a lesser Swarm than the original one from the main pass (mini Swarm has -spread, main pass Swarm has +projectile speed) And the reduced spread makes aiming and using the Swarms way more tedious than stock Swarms, and without any real benefit from the reduced spread.

Sure, you can hit more accurately, but trying to hit anything outside the size of a Leviathan (so regular pvp) becomes way more tedious, while the original Swarms increased rocket speed feels way better as that makes hitting targets a bit easier as your rockets go faster to where you’re pointing. In fact I’d say that all things considered, +speed is a better accuracy perk than -spread

Don’t get me wrong, the other buffs are pretty nice, like the increased reload speed, but I’d say the other one is the superior product between the two fused Swarms

Anyone else have any interesting discoveries like this? Another discovery in the same vein I have made is that Nest with the +rocket turn speed fusion hits enemies as close as a Steppe Spider makes stock/non-rocket-turning fused Nests hit, freeing you to use other cabins while still being able to hit enemies as close as a Steppe Nest build could