Well-designed feats should be viable from Heroic through all tiers. It's rather annoying if you have some feats that scale properly, like Weapon Focus, and others that don't, like Eladrin Soldier.
So far, we haven't had an update to fix these issues, although feats in newer books are generally better in that regard.
So far, we haven't had an update to fix these issues, although feats in newer books are generally better in that regard.