I am assuming with this strategy that DRays think they might have a team that could compete for the division title in 08 or 09. I think that is why they went pitching heavy...Price should be ready to help by the middle of next year, and Sonnastine, Kazmir, and Shields are all playoff quality pitchers. Combine that with an offense that could be the best in baseball by the middle of next year, and perhaps the DRays are giving it a homerun swing. If they can get some of these young pitchers to come in a contribute right away then I see no reason to think that Rays cant give the Red Sox and Yankees their money's worth in a race...consider this lineup by the beginning of next season.
1B: Pena / Wigginton
CF: Upton (they seem resigned to put him here)
DH: Gomes...whoever doesnt really matter
That is the makings of a team that could compete with anyone in the American League. It is also is the makings of a team that the DRays cannot afford to keep for very long, so they will probably be trading Crawford in the next year or so for some prospects or draft picks.
That is why I think they went for pitching...because while the minor league pitching depth is great, they need someone to step up big in the majors in the next year or so for them to have a shot at having a dream season.