Many iPhone users have been having the problem periodically over the last week+. I just crashed again. It works for several hours and then can't load for several hours. A couple times ago it took 24 hours to reload. Yesterday it was for about 5 hours.
Season mode performance was terrible for me, but the rewards were decent. Once I got a legend and a prime pitcher along with a good closer, my performance improved dramatically. In fact, I won the last two seasons. Once you win playoffs the rewards really bump up.