I have been using my Titan since the launch of the game, and from using the other two subclasses, it seems that you can tell the difference of Agility on Hunter and Recovery on Warlock, but for Titans, it does not seem like we get an Armor boost by a lot, I do sort of get why to keep it balanced, but you should make Armor unbalanced for the characters just as much as Agility and Recovery, make it feel different