I'm not much of a Sona player but these changes make me cringe.
She's losing the part of her that is a support. The thing that really doesn't need changing. Stoping her from dealing too much damage or giving too much heal is one thing, but changing her kit this crazy is just sad to me.
First, her ability to give bonus damage is nerfed? No, not the damage itself, the way she is able to give the damage was nerfed, which is bad. Most don't usually just stand next to Sona, and this makes her more of a target than she should be. Having to get 100 meters closer to her ADC, for all of her kit, is just sad.
She's seen less play this season than most others, so whats with these changes?
I don't care if her shield was buffed. It was already fine as is. It was just giving the shield that was hard.
Also, her E is just extremely weak. Most champs at least give longer boosts in speed. She doesn't even give a base 20% boost in speed to allies. And worst of all, it falls off (which means you may get 0.5 seconds of a 16% to 20% (with the AP bonus) speed boost... if she is able to touch you with her aura).
Her aura already falls off (to me) very fast. You don't have that long to really get to an ally and give them that one boost in AD. You don't actually have an easy time hitting an enemy with your basic attacks to either reduce their damage or slow them.
Its true, Sona has a mother load of things in her kit... but does she really need to be treated like this? Her heal isn't that strong, and since shields only pop on an ally once if in her aura, then I don't agree with the reduced size change. This is killing Support Sona and is possibly going to force her into a more aggressive Champion. I never see anyone take Sona and not play defensively. They don't even give buffs to their allies. They basically spam the Q because of its attack range. The heal and speed boost as I've said are not handy. I'd rather pick Bard, Janna, or Nami. At least they give better boosts. At least they feel like their supporting. I don't want Sona to gain a boost in how much damage she gives allies, I don't want her to have a super strong heal, and I do not want her to speed allies from one place to another. But I do want her Q aura range to be as is but the CD change can stay, I'd rather her heals AP ratio brought up from 20-40% to 40-60% because the base heal itself is sad and doesn't do much (also, if I heal more based on missing health, then I should be allowed to heal at least over 50% of my AP), and her E could use more time so why not add this, Sona gains speed for 1.5 seconds and gives allies a boost in speed for 1 second, she can gain more time for (+1 second for every 200 AP). The bonus boost she gets on her ultimate should give her +5/7/9% to allies (for a total of possible 25% base bonus MS to allies).
I hope I don't make anyone mad with this post.