Foe aggoring things really is the Bard's fault right now, but at the same time, precedent for Foe-like skills not aggroing things already exists in the form of Machinist Hypercharge. (Hypercharge debuff will not apply to anything that does not have the Machinist on their aggro table.)

On that note, precedent for summons not immediately aggroing nearby enemies also already exists for MCH turrets as well.