Soraka top raised from 54% winrate < 1% pickrate to 57%/7% in just a few days
At the same time Sona raised to 60% winrate > 1% pickrate.
But let's pretend it's those champions that need nerfs, and not toplane that is dog shit, and not that bruisers&tanks are legit weaker laners then enchanters ATM.
Fix toplane impact. Buff bruisers and tanks directly.
Work from there.