I wonder if they can outdo the add on armors though. Would have to be like -3 perpetuation and +10 MAB to be an upgrade.
All it needs for me is perp -2 and not to be hideous. I refuse to idle in RR, so I went for a pure BP-only configuration and still idle in Yinyang (or Smn Doublet if the day matches). Tarus have it good here, it's not so apparent when they are wearing hideous equipment.
In general, I think Summoner equipment tends to be situational enough that there will still be plenty of options to improve our gear. Each slot need only exceed in any one of the following traits to be useful: Perp Down, Summoning skill, Pet:Acc/Atk, Pet:MAcc/MAB, or other weird options like Pet:Damage Taken, Pet:Haste, etc.
Another thing I wouldn't be surprised to see on at least one of these pieces is: Enhances "Blood Boon" effect.