Minto was actually a Murray signing. I'm not entirely sure what the rationale was behind the move, I believe Muz thought he could make him into a decent fringe centre which was a concern for the Cowboys. Instead I believe they ended up going with Ash Graham and Ben Farrar.
I thought the recruitment was still pretty strong at the Cowboys. They were still signing a lot of talented up and coming players but a lot of them just didn't work out or they got lost in the shuffle. It wasn't until 2008 where it appeared Muz was out of ideas and the signings of guys like Ben Harris, Travis Burns, Dayne Weston etc. exposed that he'd run out of ideas.
Moore was a Henry signing and indicative of Neil identifying a problem, but not figuring out the right solution. The Cowboys had a weakness out of dummy half that had existed as far back as 2008 when Payne was beginning to slow down. Instead of grooming a couple of replacements and looking for viable NRL alternatives, Henry relied on whatever options fell into his lap until they were left with nobody. They took a shot on Moore who was an absolute long shot and it blew up in their face spectacularly and was just another factor that played into his demise.