I don't know enough about scheme to know whether Day's offense is outdated, but the experience of Howard, burst of Judkins and Henderson, and a stable right side of the OL was the difference between last year and this one.
More than changing scheme, they need
1. Sayin to deal with pressure and see the middle of the field
2. Moore to start and either get another OT or move Siereveld to RT
3. Get Bo and West accustomed to pass pro while getting stronger
4. Get an RB with burst to push Bo and West
They could use a WR2 along with a few other things, but the above would go a long way to make the offense more consistent and difficult to defend.
