@Riot one thing about the PBE and this new patch

Rammus is pretty strong now, I don't know why but he just is, Brand is OP, Swain is kind of OP with the healing buff, and Soraka was broken. Whereas Zed and Riven received no benefits from the item changes, actually receiving nerfs to their core items, and Nidalee has just never been the same since they nerfed her a few patches ago.

the healing keystone was way too good on her deathfire torch was extremely good on him making support near impossible to deal with i think they just wanted to add a reason to make out his cc which is odd i agree

The first three you listed need buffs.

But yes, the nerfs you listed are beyond idiotic, but that's part of Riot's design MO.