What are the most worthless feats (Heroic)?

[FireLance]

I don't think so personally (the fighter, ranger and rogue probably get as many burst or blast attacks as the warlord who has to struggle along with an implement, for instance)

I think they were probably balanced with the wizard in mind, as it is the class that gets the most at-will area and close attacks so far. Of course, PH2 will change this.