I'm not a RPR main but I play the job quite a lot. Perfectio giving 10 shroud (or Harvest Moon to help with downtime!) would be good but I believe that the fact that it can either be used in the pot window or kept as a movement tool otherwise is great.

Sure, it's the highest potency attack but I honestly like that it works the way it does now. It makes it unique. However, the devs will likely change it to accommodate it during burst.

To be fair, I don't think they play tested this much. Did they try some double Enshroud windows and somehow didn't realize that Perfectio is used at the very end and forces more Gluttony drift if used right after the second Communio (potency issues aside)?