Yeah DLC was pretty difficult. If there is going to be other DLC I hope it's no longer about SF. I got the fourth mission with only one second left on the clock. It's about luck indeed. The first move Akuma makes defines if you will be able to defeat him in fourty seconds or not. The fifth mission I got by spamming the X button attack. Wasnt that bad.
The ending was weird. Definitely hinted at more DLC but please no more fighting Akuma SF style. I want more Asura's Wrath gamplay! I got all the achievements though