Uso's correct.
Takuma managed to decrypt enough during the mission to salvage some base access information, internal maps, music files and the nekomachina specs from a less protected system that was a proxy of the Bowhordia KAMI computer. These are, to a hacker, the likely starting puzzle pieces he can use as a springboard to reconstitute a puzzle.
Takuma's main asset that he brings to Miharu include IT, demolition and electronic sabotage along with the Kessaku OS certification (like Miyoko). As far as I know, these have since become his speciality (though he might have lacked heart and dedication in the past - something which shows signs of changing).
I know I emphasize Takuma's specialization, but it doesn't mean Miyoko herself is unskilled. She just has a more general knowledge of that field compared to him.
Also, even though Takuma is our hacking expert, we're talking about a huge amount of information. If Miyoko intends to have results within the day, she's likely going to have to search by point of interest or keyword.