The business is not the user for SSL. It's the human logging into the website. Maybe Bank of America will care if the padlock in the URL bar is gone, but John Doe couldn't care less and probably has never noticed the green padlock and word secure in the URL bar ever.
Yes, you are correct, in that Symantec's customers will care.
I am saying the customers of banks don't give a damn about EV or not. It's not in the literature. It's hard enough to train them not to click through; even I as an IT guy would probably not notice the lack of EV unless there were a modal or bubble saying "Hey! This is different!"
B. the 9 month expiration will also make customers unhappy
Both measures will put operational pressure on Symantecs customers and eventually decrease Symantec's market share in the business.