>>97952740Aku was mishandled. I understand that dealing with replacing the voice actor (RIP Mako) was hard, and they almost parried the problem by having Aku mostly act silly but they blew their wad on him getting serious and fighting way, way too early in a scene designed just to bring the Scotsman back as we know him, only for him not to do much of anything in the end anyway.
Aku should have been all-silly-all-the-time until the final battle when he finally gets angry enough and demonstrates why he's a tangible form of evil and only Jack's magic sword can hurt him.