I agree, I rarely hi pass that much on vocals, 200 hz might be way too much. I bet that's a big part of it right thereWell, if they're lacking warmth, maybe ditch that 200hz cut in your picture...? I'd bet there's more boxiness closer to 500 than 200. If there's something prompting your cut in the 200hz area, then maybe narrow that EQ band and be more precise with the cut. But...to me, that's like saying your vocals are too bright and you have a huge high shelf...so, start with ditching that low mid cut and see if that does it.