Mailbag: Could Schoonmaker challenge for TE1?

Every year we hear about this player or that player who needs to up his game. What I would like to know is which position group as a whole needs to improve the most this year for the Cowboys to have a better chance at success? 

How exactly does one special teams coach differ from another? It seems like from watching the games that there isn't much difference from one unit to the next. What might Nick Sorensen do differently than John Fassel? 

With mandatory minicamp getting underway, the expectation is Trevon Diggs will be on hand, though obviously not participating in drills due to his injury. But is it concerning that hasn't already been around working on his offseason rehab at the team facility?

Why not move Micah Parsons to his old position of linebacker where he can blitz, cover and with his speed go sideline to sideline? He has the speed, size and explosiveness of Lawrence Taylor to impact the game at all levels. And we don't have an abundance of impact linebackers. Is this a current miss?

With the additions of Tyler Booker, Saahdiq Charles and Rob Jones, and already having T.J. Bass and Brock Hoffman, if two of these guys prove to be starter-worthy, do you see Tyler Smith kicking out to left tackle? The coaches could then let Terence Steele and Tyler Guyton, who was a right tackle in college, battle it out on the opposite side? 

Have the Cowboys done enough at the 1-Tech defensive tackle position? What they have going into the season right now seems a little risky.

How will the acquisition of George Pickens impact what Jake Ferguson can do on offense? 

What is the philosophy behind the front office's choice in waiting until the last minute to re-sign players? Is there an advantage to this that just hasn't been realized?

The one position group on this roster that seems to have had minimal discussion around it this offseason is safety. I didn't think they were particularly great last season, and there was no major shakeup there. How should fans feel about the position right now?

I completely get the idea George Pickens may be a one-year rental, but there seem to be a lot of veterans also on one-year deals. I also realize that cap considerations have to be made, but when you have a lot of players on one-year deals, aren't you a hostage to free agency every year? And surely this must hamper continuity as you have to go backward to go forward each year?

Do you think the Cowboys are still in the market to add some veteran help in the secondary? I know Stephon Gilmore's name has been thrown around a bit, especially since he has been seen at the team's facility this off season. Last time I heard, Dallas still has north of $30 million in cap space.