I don't think TTar's improvement is really that significant when you consider that he was at such a high level last gen. It's like going from an A to an A+, whereas as Breloom and Gyarados went from C's to A's. It's all pretty relative, cuz virtually everything benefitted a lot from the phys/spec split, and once you look at how high up in the tiers TTar was to begin with, it's not that significant a gain compared to a lot of the other pokes.