Verification is one of the most important steps in the design control, that it not only can address the questions of whether this is effective enough to do what potential customers want it to be, but also confirms that to what extent of adverse environment can this medical device functionally work, and will it have safety check to avoid injury to people.
My suggestion for improving the verification step is to develop a verification team that always go through and check on every steps within the project, this will make sure that every possible illegal operations, unrealistic inputs, and other design issues will be discovered as soon as possible.