Agreed on the Windu buff, I only use his buff removal and he hits sorta weak compared to others. His leader ability is fun sometimes.
On barriss; I don't think the nerf was done appropriately. Yes, she was OP, but not hard to counter and her damage created a trade off scenario. The normalization part of her heal is still decent especially if paired with another healer like JC. She will still do well in GW so it's not a total waste.
I think they should have simply nerfed her HP a bit to weaken the second part of the heal and kept her the same otherwise or maybe a slight nerf to the % heal of her health. This way she still hits weakly but her heal is worth it and with lower hp she could still be handled.