The biggest MK1 complaints seem to be the gameplay speed and lack of movement. Both are slow and need to be sped up; fortunately it seems Ed Boon and NRS are listening. MK9 actually had great movement and they should go back or incorporate some of it.
Haven't seen just about anyone play modern controls in SFVI but very curious to see how far I can go with Marissa. Should be a fun experiment. Just need to get down the control scheme.
MK1 (12) must have been in development for a long time to be getting a release date 4 months after the official trailer drops. I cannot wait to see some gameplay footage.