Judging from the videos, the dash looks like the worst part of the game. Seems very overpowered and boring. It doesn't look like there's any reason at all to use your ranged weapons against any non-boss enemies.
Dodging enemy attacks in mega man is part of what makes it fun, but this makes it seem like you can spam dash all day and not have to worry about anything except keeping your score multiplier up, which is best achieved by doing more dashes.
I suppose we'll see how it goes when it releases, but they're clearly pushing the dash as being the thing about this game.