Instead of calling for the complete removal of positionals from the melee role and alienating the people who enjoy the act of hitting those positionals, why not instead ask for RPR to not have positionals? RPR already barely has to think about positionals, it also feels like a system that doesn't really belong on RPR.

As for a replacement system, maybe using any of the avatar's attacks will latch the avatar onto the enemy and using any attack that consumes soul reaver stacks from the same position as the avatar will cause it to attack too. Basically you can control where this "positional" is, it also allows you to just camp one side and just never move if you want.