The swordsmith arc is defitely a downgrade from the preceeding seasons, the fights weren't anywhere as entertaing, the character development was rushed, i mean 4 flashbacks of 4 different characters in one season is just not well paced for the number of episodes the season has, also the backstories are just becoming repititive at this point, not to mention the fact that zenitsu and inosuke got no screen time, they just make an appearnace in the first and last episode and thats it. The only good parts of the season were when akaza was in the alternate dimension and the final episode.