The faerie gauge feels weird because it was added in StB when YoshiP felt that every job needed a fancy unique UI element, but SCH was already a well designed job.

So, they just added Aetherpact and made you naturally accumulate gauge playing SCH the same way you already would and weakened Embrace, the Faerie auto heal, and removed Rouse, an ability that would enhance all pet spells, so that Aetherpact could feel strong and called it a day.

StB SCH was fine overall, but Aetherpact and Faerie Gauge feel like bloat because that's exactly what they are: extra actions that did the same thing SCH already did with more work involved so they could have a flashy job actions trailer.