Here are Stephen Drew's numbers for 2013 (including post-season):
G-140 PA-558 AB-496 R-61 H-118 2B-29 3B-9 HR-14 RBI-71 OBP-.310 SLG-.415 BB-56 K-143 Pct.-.238 OPS-.725 OPS+-96
This includes Drew's pretty dreadful post-season and lowers his numbers, while still providing a sample for a full season (140 games).
Those numbers for a single season would put Drew still as an above-average SS, but nothing special. His OPS would fit between Brian Dozier and AJ Pierzynski. Drew's age, going from a great lineup in a very good offensive home park, and career mediocrity all tell me to stay away from him. He is a good defender, but IMHO, no better than that. Getting Drew for eight figures for multiple years and surrendering a high second round draft choice just doesn't make sense to me. The Twins can get better value spending on other positions. I think the best course to take is to locate someone in another system and trade for him.