I do not that you can have a problem in which you have too much air flow.
This means that air is not providing your PC the cooling effect than you need on your componants.
Yes, theres no such thing as TOO much airflow, the more the better.
But remember, more air going thru ur case means it will get dusty faster and you will have to clean it more, unless the air is moving thru it so fast the dust never gets a chance to settle on anything, hahaha.