I'm not sure what you mean by fixed. If you mean good....then I'll say "no". If you mean better...then I'll say a resounding "yes".
Look at the team that was on the field most of last year
Ware: injured and ineffective most of the year
Hatcher: stud
Hayden: role player forced into starting role
Selvie: pleasant surprise
Carter: struggled to grasp scheme
Lee: never healthy
Durant: struggled
Oscan: arguably best defensive player
Carr: struggled
Claiborne: struggled, injured, but flashed occasionally
Church: ok...not great..in first starting role
Heath: killed us. How many time did he miss a tackle, or give up a jump ball?
Now, how are we better? Well, I think Marinelli will allow our CBs to play to their strengths. Carr and Claiborne are man/press CBs. Church should be more comfortable in this scheme, and JJ Wilcox has impressed the staff already.
At LB we should at least have more depth. Holloman really came on at the end. Carter, hopefully will figure out the scheme. If we could only have Lee healthy, then I think this group could shine.
DL was ugly. No depth...the guys brought in were gritty, and I loved the effort. Just not a good situation. This year we have no Ware. But he was a shell of his former self. Hatcher finally realized his massive potential. We replaced Ware with a rookie. Now, he won't be the Ware of seasons past, but there's a good chance he can be the Ware of last season. Melton has shown the ability to excel in this system. Selvie will have an entire offseason with the team, after having an impressive year. Crawford flashed potential in his first year (just watch the Pitt game). If he's recovered, he will provide some great depth...if not more. McClain is an upgrade over Hayden. Mincey, Bishop,and Gardener all have more talent than some of the guys we were shuffling in and out last season.
We will be better, but we are not fixed. One more offseason should get us there.