It is absolutly possible to handle a Sadida and make wonderful damages and supports for your team you just have to think about what sadida is now, just think about your builds.
"With stupid AI" you say - well i just hope they fix the AI.
The fact that its possible to handle current sadida doesn't change the fact that it's not what it should be and that some passives are not working togather with each other like they used to before the revamp. Now you either have half of passives activated or other half, before you had all passives available at any given time and you just had to choose wich ones you want to get for your oryginal build. Now builds are less of a choice and its just too obvious what you have to level that is just boring.
And some passives are ridiculously underpowered like Explodoll. Also Doll Link is not really showing the proper link as, like i said, there's no link between Sadida and the voodoll it places. It's just awkward logic. It's the all other dolls that should receive dmg for Sadida, even in anime madoll of Amalia suffer pain when Amalia get hurt by wild roses. And when i ask people around they all would love to have dolls taking part of the dmg for them aka the way they should. It was lovely mechanic that made Sadida special. Removing it was the worst thing ankama did to this class.
Also promoting to not use summons while playing summoner class by making it have more dmg they it would with dolls is also wrong. And loosing all the dmg bonus gathered for 5 turns of not having summons when you place just 1 doll is another bad thing. Fights doesn't last long enough to make Sadida able to swap between "2 builds".
And you know its possible to play foggernaut well or sram with invisible build, but it doesn't change the fact that, just like Sadida, they need changes (improvements) as some things are simply broken by current design.