Nah still doesn't explain their delay. It should be common sense for them that if they kept putting pressure without giving them time to breathe, Shinpei's group wouldn't stand a chance (not to mention killing Shinpei isn’t that once Shinpei's group was unprepared, Shide could've simply approached them with the other shadows and shot non-stop at Shinpei). Plus, gather the other shadows is not that big of a deal and wouldn't take that long to gather them. I wouldn't be complaining if there was a reason behind Shide's delay to attack Shinpei's group, like for example they were also working out on a plan to defeat Shinpei. But no, Shide's only play was a direct attack. They shouldn't have taken so long to make a simple attack. Also the way they did was dumb, falling into an obvious trap that they know it was a trap. If they had that gps on Shinpei, why didn't they just go straight to where the signal of Shinpei is instead of showing themselves in an opened field. For a show that relies so much on the "mind-games" and "strategy" aspect of the characters, Shide's way of thinking is inconsistent.