I see this game more or less as some kind of "reboot" or "remake" , a refresh updated new version of traditional old MK histories .... if it's good or bad, well, fans will judge, anyway, the game itself is too much awesome to be "tainted" by some called "negative" details in history .... if they (NRS + WB) are changing things forever, well, it's done already, hardcore fans maybe will complain about this or anything that they are used to known, but, what is done, it's done.
I know MK history is one of the richest in details and best around, but, the owners of MK franchise, if feel like , will do whatever they want, no matter what. If this time history gave almost a 360 degree turn up change, we should remember that Ed Boon agreed with that and allowed that, since he is the most specialist on MK among the entire NRS team.
I don't see these changes as negative one, but instead, as "Different" one this time. The game has a fantastic gameplay, lots of game modes and too much fun aspect to be diminished at this point, because of leaked details on story mode.