In all honesty, I fear that some of the nerfs to Rose may be too much... especially now that she doesn't seem to dominate matches as much. Taking the hit to her health will definitely hurt her usefulness once the other nerfs take effect. I fear that you're making more knee * reactions to feedback and severely overcompensating. Beta Rose should have been the first step. I do agree with the leading your target part of the update for her.
In all honesty, I felt Ice Rose was the weakest of the bunch and don't understand her charge rate nerf when it already took a while to charge her shots up... in addition to needing to hit the trigger each time you wanted her to fire, unlike the other roses which were automatic fire when you held the trigger.
I only have one game with Fire Rose, so don't really know how she plays... so can't really provide feedback with her.
I'm also unsure about the goop cooldown on the Chomper. He is a CQC character and relies on getting in close. It's not like the gooped victim is unable to fire back or move at all, so don't fully understand that nerf.