Is your client happy with the edited videos you have been delivering? Not to suggest that you bite your tongue here, but if the paying client does not recognize bad shooting, and is in fact satisfied with the delivered videos, your comments/criticism may fall on deaf ears.
Take a hypothetical client of ours – A client who always useS the audiovisual techs (poorly trained) included with their convention center AV contracts(cheaper than using an outside crew) to shoot live events – the results are nearly always predictably poor (low audio, poor lighting, high gain, wobbly shots zoomed from the back of the hall, slow reaction times when a speaker changes) but despite suggestions for improvements or alternatives, they go with low price over higher quality every time. Quality is subjective. The client is happy that the event has been documented at all.
It can be frustrating to work with incomplete materials – you might take a proactive approach and give the client a suggested shot list for the next video, based upon what you know the shooter usually misses.