I'll be the caster main that breaks the trend, then, and say not only should positionals remain, they should go back to the level of importance they used to have.

Not just 60 potency bonus on each positional landed, but make entire effects and combo chains reliant on hitting those positionals. Back in ARR, DRG needed the positional or Heavy Thrust wouldn't apply; it needed rear or Impulse Drive wouldn't work. Maybe don't make them so unforgiving as to shatter combo chains like Impulse Drive was, but give dps a more interactive reason to hit those positionals than an imperceptible to the naked eye potency buff.