I see this as a similar issue to Weapon Specialization. True, some fighters won't take it, but the vast majority of 4th level or better fighters will. It is almost a class features, and lets the fighters compare to the barbarians. Weapon Specialization is to me a 'no brainer' for a fighter.
The issue that has been raised is monks the don't punch. Well, they are more viable than fighters that don't swing, but not by too much I think. The monk can focus on those special maneuvers, but any reasonable player in anything like a standard game will know that there are creatures they won't work against. Weapons just don't make sense in the face of this feat either. At the cost of 1 feat I can dramatically increase my damage potential. Even with limited feats, that is always a good deal.
Take another example of a feat I would deem as a no-brainer: improved sneak attack. Your d6 sneak attacks become d8. Now, I know sneak attack isn't the sum total of a rogue, but wouldn't you want that feat for your rogue? Past fifth level, that is great boost, even if it won't always come into play. Plus one damage per two levels per hit is steal for almost everyone.
The difference in the feats mentioned here is that fighter needs specialization, and improved sneak attack is overpowered since rogues have so many options. Given the status of the monk as a weaker class, I think they deserve it. Its a no brainer, but not a problem. Oops, wrong thread.
