According to PWInsider.com, it wasn't Triple H – as many have assumed – that made most of the WWE talent cuts today. Instead, the decision came from Talent Relations executive Mark Carrano, who also made many of the phone calls to each of the released former Superstars.
Furthermore, it would appear as though WWE isn't done with the roster cuts. Jim Ross also noted in his blog that he doesn't believe the releases are over either. The belief is that a lack of WWE Network profits has caused the cuts, which will likely extend to office employees over the next few days.
Of course, with so many potential Superstars working in NXT, and dozens more currently training consistently at the WWE Performance Center, cleaning out the roster just means more people are free to move up, or down between developmental and the main roster.