I think Titan does his job well-enough right now though a Provoke on him would be kind of cool. As for the egi designs, I feel that Titan and Ifrit look fine, but Garuda just looks bad to me. She could use something to make her look a bit more like her Primal form. As for the class, it's fun but I just feel as if I get a bit more bang for my buck as a BLM. Enkindle CD reduction or Tri Disaster (I don't PvP so forgive me if it's useful there) change would be fantastic for AoE. I'm cool without doing as much damage as BLMs, I just want to do more than I do right now in those big pulls.

EDIT: Has there been any discussion on Spell Speed and the Arcanist class as a whole for 3.0?