I don't really recall any other trade assets or veterans playing frequently, it was mostly AAAA filler and bench guys because they didn't have any alternatives. Hunter, Lough, Burris, Paredes. You had Bourjos who might have been traded before he got injured. And they were still evaluating Asche and Ruf (I don't know why, but they were). They had no one else to play the OF until Altherr returned. Rupp was in his first season as a starter. The rotation was all kids. Howard was a back-up by July. Goedell should have played more, but he was on the roster. And nobody in the bullpen had value. They got burned on Andrew Bailey but he wasn't tradeable at the time.
If you need Klentak to prove something, you need him to prove something, but I think he's on a different timetable. Not entirely by choice - obviously if Crawford was ready or the Phillies had developed, oh, a single prospect who could play the OF by now, or if the players Amaro acquired in his last round of trades had been ready more quicky they would have played, and we wouldn't have seen Galvis, Saunders or Rupp this year.
To me they had one tradeable player last year, there were three things they could have done with him, one of those options was not available to them (when the Marlins deal fell through) and they made a small mistake on the other.
And let's not forget - Hellickson wasn't that good! He was adequate. At this time last year his ERA was 4.41 (he got better later in the season). It would have been nice to get the Robert Hernandez return for him but that's still entirely possible, and given the state of the team and the rotation this year I don't think it is a bad thing that he came back. I would have been fine watching Adam Morgan instead but I don't think most people would have been.
The trade deadline is basically a TV show invented by ESPN, of course it's great to get assets when you can but it's hardly a true GM measuring stick in the big picture. So few of the moves made then turn out to be important in either direction. I'm much more interested to see if the new analytics approach is worth a damn and what he does this off-season (both in trades and FAs).
I will say, and AndyB has mentioned this often, it would be nice to see them do a trade deadline deal where they take on salary in exchange for a prospect (or an upgraded package as part of another deal). I don't know what kind of dead wood players are out there; turns out the Phillies had two themselves.