I think this is a great idea. Games like SF have longevity because if you play a character in the SF2 series, you can pick that character up and at least have an idea of how to play in the newest iteration of the game. MK has never been like that save for MK 1 through 4. After that, all the moves changed, inputs changed, combos and strings changed. I think that by going with the existing moveset and similar combo strings, they're building on a good foundation and evolving it rather than trying to re-invent the wheel. Ultimately, I think it's better for longevity of the series.