There appears to be a tug of war in reference to the ranger being a combination of a fighter, monk and rogue. The abilities have to match what niche the ranger is trying to fill starting with favored terrain and/or enemies. As written general abilities to hide, dash, 1d10 hit dice, or automatic abilities like natural explorer start to step on the other classes toes. Because if the other classes are suppose to be the toughest\generalist (fighter), stealthiest\striker (rogue), or defensive\movement (monk), then I am not sure what is left.
I believe having a disengage action makes more sense than dash, and any hide/stealth ability should be tried to terrain if is surpasses the rogue, and 1d8 hit points, etc.