OK, so since no one responded to my question above
I went ahead with a purchase of a used VK7. (I recently bought a used white and silver VK5 and am in love with the glove, it didn't come with a VK5 blocker) Since I loved the 5 so much, I wanted to get a back up glove so when I saw this 7 set for sale, I went for it.
I tried it out on the ice for one session. I know that's not enough time to make a conclusive decision, but personally, I know I like my non-NHL spec VK5 better. So I am bucking the trend in wanting to go back to a 48" glove instead of the current trend towards NHL spec gloves.
So this is simply my experience, others may feel that they felt no change in going from a 48" VK5 to a VK7. Maybe I should give it a longer trial period...