Flipping the classroom sounds good in theory, but it has its limitations in real life applications. It has a time and place and cannot always be fully implemented into every course and topic. Some of it is good (like working on assignments together in class instead of having students work on assignments alone at home) some of it is not good (lecturing "outside" of the classroom, planning classes based on the idea that all students completed their readings in full). In person classroom lectures are still a part of instruction and a good instructor can modernize their lectures to make them more interactive and engaging for students.
Nontraditional ways of evaluation are important parts of a good education and I agree that most standard multiple choice tests do not do a thorough enough job of actually testing if students have a solid understanding of the material... however this concept is not mutually inclusive to "flipping the classroom" and a standard class format can still support unorthodox methods of student evaluation.
