I think it goes without saying, that the result is more profound, than if there were fewer Major cards. Are you asking this, because you or someone had a reading like this? We'd love for you to share.
If it were one of my readings, I would make it a point to point out that the cards are telling me that the underlying tone runs far deeper than the client may realize; or that they are in a very heavy-type situation that may be more than they can handle.
I summerize the difference between the suits as the difference between being "symbolic" and that which is "archetypical". Symbols carry subtle but obvious messages, like Handicapped signs, or a Police badge. Archetypes have a more subliminal nature, such as that of the images of Gods and Goddesses- they represent "cultures" rather than the writings of those cultures.