They're not GAMEBREAKING but....

Barrier Module An earth-based automaton attachment.
Functionality: Increases chance of blocking with shield
Earth Maneuver: Adds Shield Mastery and shortens Shield Bash recast time

Percolator A water-based automaton attachment.
Functionality: Increases skill gain rate

Vivi Valve A light-based automaton attachment.
Functionality: Increases "Cure" potency

Disruptor A darkness-based automaton attachment.
Functionality: Use "Dispel"

They all have their uses. I know the first complain will be "Why didnt they just add Dispel to xxx automatons spell list?". But the Cure Potency one is really nice, the Increase Skill Gain rate is like a gift from god to people like me, and the Shield Blocking seems nice too, Considering Shield Mastery gives bonus TP when blocking.

Hopefully its a decent base rate, since they have no "Shield Skill". Hopefully you'll be able to get these as easily as the others.

I know i'll be doing ENM60 when i log on, Thats how i got the others (Didnt have any Imperial Standing lol ;