I dislike monk because of positionals from both rear and flank. It makes the class feel too twitchy for my tastes. Ninja is fine with only rear positionals. Haven't played dragoon or samurai so far. It's not like I have time to gear up and play all classes though, so I'll just leave monk to those players who like the twitchy, constantly-on-the-move playstyle.

No need to do anything about positionals IMO, but I won't be heartbroken if they are removed.