It's not hard to imagine Giants coach Tom Coughlin surveying the room during a team meeting and wondering if somewhere he made a wrong turn. No team has made more personnel changes this offseason.

It has been that kind of offseason for the Giants. They turned over the roster like never before with 32 new players added since March that are currently on the roster.

When the Giants take the field Week 1 in Detroit, they will be a very different looking team. Gone will be mainstays like Justin Tuck, David Diehl and Hakeem Nicks. In will be Dominique Rodgers-Cromartie, Geoff Schwartz and Odell Beckham Jr., to name a few.

There may even be more to come with almost four months until the Giants actually play a meaningful game. In the meantime, let's look at the best five decisions the Giants have made this offseason.

(Note: Experts' grades will follow on Saturday.)

5. Signing Geoff Schwartz

The offensive line was a mess last season. Quarterback Eli Manning's life was in permanent danger and he was sacked a career-worst 39 times (nine more than any other year). The Giants also had the NFL's 29th-ranked rushing attack. The interior of the line was especially troublesome with a deteriorating Diehl and injured Chris Snee. There was no way the Giants could ignore the issue this offseason. So, the first player they signed in free agency was the best guard on the market. Schwartz ranked among the Top 8 at the position last season by Pro Football Focus, and gives the Giants some much-needed stability on the interior of their line. This was the move that began the offensive line rebuild.

4. Signing Rodgers-Cromartie

Even though their secondary wasn't necessarily a weakness last season, the Giants were serious about adding a top cornerback. They finally landed their man when they outbid the Jets for Rodgers-Cromartie, who was coming off a strong season in Denver. His signing takes the Giants' secondary to a completely different level, and makes it the strength of the team.

(Note: The signing of Walter Thurmond would have been my favorite move if it had been for more than one year. However, if he plays well, it's likely going to be a one-year rental with Rodgers-Cromartie and Prince Amukamara still under contract. Thurmond's payday will likely come elsewhere.)

3. Concentrating on Special Teams

You can make the argument that the Giants' special teams were equally or more inept than the offensive line and the offense as a whole. They allowed three punt return touchdowns by mid-October, and almost never produced a big return of their own on kickoffs or punts. So what did the Giants do? They went out this offseason and loaded up on special teams contributors. It went beyond the signing of returner Trindon Holliday, kickoff specialist Quintin Demps and the drafting of Beckham, who did some kicks and punts at LSU. Cornerbacks Zack Bowman and Thurmond both have excelled as special teams players. So has sixth-round pick Bennett Jackson, who was an exceptional gunner on punt returns at Notre Dame. These moves may not grab headlines, but they were huge for the Giants this offseason. It can be argued that the third phase of the game is just as important to overall success as offense and defense.

2. Drafting Weston Richburg

Put me down as a big fan of Richburg. He was the best center in the draft and should be perfect for an offense that will run a lot of screen passes and ask its center to get outside and to the second level with regularity. The second-round pick should have a nice, long career at a position that has become increasingly more important in today's NFL. His addition may not reap immediate rewards (free agent acquisition J.D. Walton may start in the short term), but it will be worth it in the long run.

1. Overhauling the Offense

If you watched the Giants play at all last season, it was obvious this needed to happen. Everything about their offense needed to be changed, and that included their philosophical approach and coordinator. So Kevin Gilbride "retired," tight ends coach Mike Pope and running backs coach Jerald Ingram were let go and Ben McAdoo was hired as the new offensive coordinator. They obtained offensive line help (see above), added some weapons and provided Manning with a much-needed fresh start (in a West Coast-style offense) that they hope rejuvenates the 33-year-old quarterback. It was imperative for the future of the franchise that the Giants moved into the 21st century with their offense. They did it with their biggest and best move this offseason.