My info is based on Alpha 2.0
The Pathfinder Fighter "Weapon Training" has the same fault as the original Favored Enemy from 3.0. If the character finds a really nice Lance, he can't take full advantage of it, and bonuses for greater abilities keep advancing in a weapon group he may not be using anymore. Converting this to use the same basic mechanic as the 3.5 Favored enemy (pick a new one at each instance, and then choose a group to gain a +1) would put more of the character development in the Player's hands. Right now, it locks things at early levels.