Old Soraka W would be perfect in todays one shot dmg game.
If nothing else, her old W would be awesome. It gave a lot of armor, which would be perfect against insane dmg that's in the game right now and it didn't take her 10% of hp, wouldn't be op since it had a much bigger cooldown. QE are good updates cuz her old Q would be somewhat useless today since you can't go near any of the tank/mage supports... and E is better since you can walk out of it and not get point and click silenced, but it doesn't give mana anymore. But I think her W revert would be cool, both for her and the bot laners she would be protecting against assasins.