“[W]hether, after the 2023 amendments to Federal Rule of Evidence 702 and this Court’s en banc decision in EcoFactor, a panel may treat as issues of ‘weight’ matters that go to the questions of (i) sufficiency of an expert’s basis for his opinions, and (ii) reliable application of methodology, including where trial testimony departs from the governing claim construction and where a survey expert fails to demonstrate representativeness of the survey population and employs flawed survey question design.”
