Insofar as that's true*, all the trials for which we've seen results were planned before Jin was with the company. I expect the design of trials since his arrival, including choice of endpoints and powering, to be excellent, starting with the 3-71 schizophrenia trial.
* I maybe agree, but one could reasonably argue Anavex might not have been able to do it while husbanding the small company's resources and that the cheapskate approach has economically broadened the company's knowledge base and might yet succeed on the P2b/3 MAA despite it being too short and otherwise underpowered.