Reach doesn't mean much if a character with half the model size can jump crazy high or run crazy fast with speed, he'd be hard to hit zigzagging normally and then when you add the normal force powers any Jedi has access to, it'll get really hard to deal with really fast. especially for classes like sbd and droideka. With droideka's slow turning and weird angles of shooting up close, it can be very difficult to land shots on a smaller target. And the with the SBD shooting from a naturally higher point compared to other enemies, yoda would be abld to walk underneath his shots without even needing to crouch, the SBD would have to aim straight down to just flinch him up close and would have to crouch to land a slap.