It was a fairly busy off-season for Dallas as they looked to add depth and find that top line forward they've been searching for. I'm only going to analyze moves that were made in the off-season, not looking at trades made last year. Let's look at each of the moves individually in no real order.
Carlos Rodriguez Signing - B+
FC Dallas signed Panamanian Carlos Rodriguez from Tauro FC for outside back depth. While Rodriguez may not be a top 10 MLS outside back, he does look like very solid depth and a guy that can fill in at each wing position on the field. He doesn't do a lot to get you beat, though doesn't offer a whole lot of offense either. At a contract of just under $65k, you've got to say he's certainly good value and a guy that you'd hope Dallas purchases to keep around long-term.
Marvin Chavez Trade - C-
This is an enormously difficult decision to analyze completely fairly as we don't know the ins and outs of FCD's salary cap situation and how close to a straight swap for Blas Perez that the Marvin Chavez trade truly was. On the surface, however, it's tough to defend this trade. Chavez has moved to San Jose and blossomed on the right wing with Steve Beitashour in what has become arguably the best right side in MLS. He's become an integral piece of first-place Earthquakes and has five assists in 13 games. Dallas needed a forward more than they needed a right midfielder, but Chavez is a really tough player to lose.
Jeremy Hall Trade - B
This was an under-the-radar move that didn't raise too many eyebrows, but trading Jeremy Hall to Toronto FC for their second round draft pick in 2013 could end up being a really nice move. TFC is in last place and that draft pick is looking like it will be #20 overall which could land you a really nice piece while getting Hall's salary off the books.
Blas Perez Signing - A
As we talked about earlier, Perez is probably the MVP of FC Dallas in the first half of the year and has been the forward Schellas Hyndman has been searching for since coming to Dallas. If FCD is going to make a run in the second half, it will probably be Blas grabbing a lot of the goals as long as he can stay healthy. What a fantastic player and positive addition to the team.
James Marcelin Signing - C
Marcelin isn't a world-beater but he does have a role to play on the team as a late defensive sub and at basically a league minimum contract of $44k, you can't argue with it too much.
Hernan Pertuz Signing - A-
Pertuz has been a really, really nice addition to the FC Dallas backline. 11 starts and some very smooth defensive play has shown that Pertuz is a guy that should probably stick around here for awhile, and at 23 years old we could see him get even better over time. I really like this addition to the team and I've heard he's a fantastic locker room guy as well.
Maicon Santos vs Scott Sealy - C
FC Dallas chose not to re-sign Maicon Santos in the off-season, instead basically opting for the cheaper Scott Sealy, saving about $60k in cap room. Santos has 7 goals in 15 games for DC United this season while Sealy has yet to tally for FCD in a reserve forward role. I have a ton of respect for what Sealy has done to get back to full health, but he doesn't seem to fit the style that FC Dallas tries to play with their lone forward up top. Would Maicon have finished some of the opportunities that Castillo and Jackson have created?
Draft Class: Hedges & Lee - A
Schellas certainly hit a home run with his drafting this season. Any time you can find a starter from the draft, you're doing a good job and Hedges looks to be a starter for FCD in the short and long term future. Alex Lee has been a great addition to the locker room and once he gets healthy could be a guy that contends for a defensive reserve role.
I think overall, the additions to the team have been good. If you go back and look at all the international signings Hyndman has made, he has far more hits than misses, but his dealing within the league isn't without it's flaws.