Trotter won't be an all pro, but he's proven in this system and worked well with JJ in the past, so I think it's a great sign for the Eagles. They are saying that he's coming to be Simeneau's backup, but I think he'll be starting at some point. Either way it gives the Eagles some solid depth at linebacker, which they need stop the run better than they did last year. At this price I think Trotter is worth the risk since he's done it here before.
Also, I think it helps debunk the myth that Andy Reid lets personal feelings get in his way of football decisions. Trotter left on very ugly terms, and honestly I thought all bridges were burnt by both sides in this one. Glad to see that things could be rectified by boh sides. Personally I think if Trotter proves he can do it here once again he'll probably sign a multi-year deal with the Eagles next season and be here to stay. Eagles run D were better with him in the past, and this is obviously a system that has worked for him. Hopefully it works out for both sides --- and it's more money wasted by Daniel Snyder (I love it!)
You bring out a good question about the secondary, and my hope that this improved LB core and dline will take some pressure off the DBs. IF they can get enough pressure on the QB early, I think Brown and Shepard should be able to hold their own. Having Brian Dawkins back there is also a nice security blanket too. I've heard a lot of good things about Matt Ware so far too, and while I'm not putting a ton of faith in him, he could have some impact in the dime.
Right now the Eagles depth chart looks like Jones at LLB, Simeneou at MLB and Wayne at RLB, and I'm sure Trotter and Ike Reese will both see their share of time. Couple that with Kearse, Simon, Walker and Kalu up front, and I think that the Eagle defense will be improved against the run. Losing Emmons hurts, and I do think going from Carlos to D Jones is a downgrade, but I like how they look overall on paper this year. The Eagles have put all their chips in the middle and are going for it this year, and as a rabid fan I'm pretty excited.