Just like Cass, you haven't learned with Sona.
Sure she is doing "fine" now, but there's nothing exciting about a champion who is purely designed to get more passive power as the game goes on. Didn't we learn this with Cass? And now you have applied this principle to a support champion - a role designed to be influential in the early game, the phase of the game that is most influential.
The result of this Sona rework is useless, doesn't address any of her core issues, and she is worthless in protecting her ADC until she reaches her broken URF mode late game. Her 'oppressive' poke in lane was never truly oppressive beyond an ELO that understood just how predictable and binary how patterns were. (i.e She moves forward, you move back or trade. Call your jungler for free double kill.) With the nerfed Q damage, the only reason to be in lane is to make sure you collect all your Spellthief charges. This is a rather sad state of affairs for Sona, Riot, and balance in general.
Come on even Soraka now, a kit designed to disengage and heal, can outpoke Sona in lane and never oom doing it. Who thought it was OK to make her Q damage, slow, allow free 2 AAs, and heal back whatever damage if they decide to return your trade? every ~3 secs
As I type this post, my adc is 0-2 6 mins in because I can't even throw a bubble or a tornado or a silence field to help her. My only recourse is run away immediately so I don't feed, too..this is not okay, Riot.