Yuumi Vs Other support.... Somme suggestion
OK, First of all, the new support seems super cool, but
as a main support, there's thing in this new support i think are maybee too much?
Let's compare this new support to Janna 
i didn't see the numbers and are broken their ratio will be yet, but janna's shield was considered super OP because it gives AD and a large shield, so you nerf that multiple times....
Now this new support will give AP/AD permanently while attached to an ally. I just have to build full AP to give a lot of AD to my ADC?
- it's adaptive damage so unlike Janna, if I don't want to buff an ADC , i can buff the AP carry.... it provides way better utilities. Plz think twice on the ratio you'll put on that.... or give janna a buff to make her relevant....
on the top of that, the shield her passive provides stay untill it's broken... You nerf janna's shield with a decay which was super bad.... and even janna's shield wasnt permanent it had a timer.
dependending on how big this shield is, why dont you put a timer on it? it would provide some challenge to yummi player to time their basic attack right to pop the shield at a good timing and punish those who dont...
at this point Janna is irellevant, why would i play her? yes she still has peel..which the new champ don't have, except with ult,
also yummi Q = Janna's W, but skillshot instead of point and click
and E = Nami's heal X 2?
(why would the heal gives movement speed?) let nami have this
in my opinion, being invulnerable and giving heals and shield is already super op + you got a slow... while giving free stats? yes ok but not OP ratio+ don't oberload her kit.
Thank you!