He was the Head Coach under a GM that used three consecutive 1st round picks on WRs and 4 total 1st round picks on WRs.
Here are Millen's drafts during Marinelli's tenure:
(I think the only defensive players that remained with the Lions a couple of years after Millen was gone are Avril and Fluellen.)
2008
Cherilus, Gosder (from Min through KC) OT
Dizon, Jordon LB
Smith, Kevin(from Mia) RB
Fluellen, Andre(from Cle) DT
Avril, Cliff(from Dal) DE
Moore, Kenneth(from Mia through KC) WR/PR
Felton, Jerome(from NO) FB
Cohen, Landon DT
Campbell, Caleb(from NO) LB
2007
Johnson, Calvin WR
Choice to Buf
Stanton, Drew(from Buf) QB
Alama-Francis, Ikaika(from NO) DE
Alexander, Gerald(from Bal) S
Choice to NO
Choice to Bal
Choice to Jax thru Bal
Davis, A.J.(Choice from Arz thru Oak) CB
Ramirez, Manny G
Choice to StL
Choice to NO
Choice to StL
Baldwin, Johnny(from Den) LB
Choice to Min thru Den
Choice to Dal thru NYJ
Robinson, Ramzee CB
2006
Sims, Ernie LB
Bullocks, Daniel S
Calhoun, Brian RB
Choice to NE
Scott, Jonathan OT
McCann, Dee CB
Matua, Fred G
Cannon, Anthony LB