I don't think it is a disparity so much as I look at purpose of a story. To me, DS9 had a very unique story told and doing a DS9 legacy series but then telling stories about things not related to DS9 characters strikes me as odd. Might not be a disparity, but I wouldn't call a series having DS9 characters go and dealing with plotlines from Picard feels sideways. I'd rather just have a post Picard series where multiple DS9, TNG and Voyager characters could appear.
Perhaps a distinction without a difference.