Although you may ultimately be admitted, your grades are trending down with more B’s each year. That is not the transcript that pops out in a good way in the SCEA round. Since you are about to take your most challenging schedule this fall, I would imagine you would be deferred so that you could be compared to the RD pool once your fall semester grades can be seen. You may want to use your EA card somewhere less competitive and surely focus on your studies this fall to show you can rise to the top in all your AP classes while maintain your EC involvement.