Sona's lack luster impression

So am i the only one who plays this champ and just have a constant feeling of "well i was of basically zero use as a support" for pretty much the entire game. Her ultimate is great for engage/disengage but outside of that i never really feel like my plays have much of an effect on the game as a whole. The bonus damage from Q often just feels unimpressive in the over all battle. Her heal and shields rarely feel like you are saving someone or that the mana cost was worth the investment. Her movement speed bonus is so short lived and on such a longer timer that it just doesn't feel like you got yourself or your team to the destination fast enough to warrant the need for it to be a part of your kit. For a champion designed around buffing your whole team, does anyone else feel like actually doing that just leaves you feeling MEH.

You see a Leona land a zenith blade into stun it's clear what she did and how she is helping her team. Thresh hooks someone or uses his lantern to pull a team mate out of or into combat. scoops up his ally and saves them from death, Braum leaps in and tanks a bunch of damage thus saving his ally(s), Soraka quickly heals several hundred points of damage over and over, Janna manages to disengage the enemy team allowing her team to win the trade, etc.... For all the other supports you have a clear "thing" you do and when you do that it has a clear result, be it saving an ally or engaging on an enemy, so long as you are good at doing your "thing" people notice. How often do you see someone going "thank god Sona gave me that damage boost to my next auto attack, against non structures"; "oh thank god Sona was there to negate that small amount of damage"; or "We never would have made it in time if not for those speed boosts from Sona"

Outside of landing a good ultimate, She never (personally) feels like she contributes much to the game as a support.

What are other peoples thoughts? As a support do you often feel like you are contributing to your team, besides your ultimate? To be clear your poke damage isn't being counted here (Supports are not judged on their damage output)