One thing with Atkins is he goes after players who other teams don't want to protect on their 40 man roster. Just last trade deadline we saw Paulino, Perez, Wall, Waguespack, Merryweather, McKinney, etc, who other teams gave up either to take off the existing 40 man or to not have to make a decision on that winter. Then this winter we saw it with Thornton who the Astros had to protect prior to the rule 5 or risk losing him.
Unfortunately that may be where we have to start as we try to guess the returns on certain players. One would hope that Stro and Giles would be able to net real prospects regardless of 40 man roster implications, but we have to set ourselves up for reality.