He could have A) shot cog Akechi and then let us finish him off B) shot the alarm and ran behind us or C) Joker shoots cognitive in the first place I know its dramatic but it bugs me
It was kind of Cognitive Akechi to stand there and let the real Akechi monologue for like 10 minutes and shoot the bulkhead switch before bothering to do anything.
Honestly the entirety of P5 after you get arrested dragged on forEVER.