Tell me why I should be patient about a "scheme change" when this team has blown huge donkey balls in the tackling department.
Possible scenario, if you're still getting lined up as the ball is being snapped, means you're already at a disadvantage...plus you're trying to think what your responsibilities are while the play is happening, which causes a slower reaction. Tackling was bad in '09 (new scheme, new playbook, Bynes and Stevens sucked). Tackling was slightly better in '10 (same playbook, same scheme, Bynes and Stevens were better). Tackling was worse in '11 than it was in '09 (same playbook, same scheme, underclassmen across the board). Tackling is slightly better this year than last year (different playbook, different scheme, same personnel). Once the players get used to the playbook and scheme, they won't have to think as much out there on the field, they'll just know what their responsibilities are and they'll be able to make plays.
The first thing the coaching staff needs to do is get the play call out there quicker.