I'm having a few issues as well. Mine kept crashing during the factions trailer. Specifically when Kano gets killed. It finally got thru after a dozen tries. I've only been able to play offline so far. I was able to download Goro, but not the samurai skins pack. I'm assuming it's my connection, but all my other devices are doing fine. Idk, I'm calling my cable provider tomorrow :/
I haven't finished downloading the day one update yet as I just put it on hold to play, but I was still connected to the internet and have not experienced any issues as of yet, im sure tomorrow once I finish downloading the update and grab Goro and the Samurai pack ill be able to help more lol
My internet connection is DREADFUL, but to my surprise I was actually able to play online without any issues whatsoever. I couldn't with MK9, I was getting disconnected every single match.