You are greatly underestimating RG3 if you assume he is the craptacular passer that Brad Smith was and just some raw athlete. Our offense threw it as well or better than yours did in our common foe games (Tech, OU, KSU, KU, Texas, CU) and ran it much better (1.5 per carry more than isu, 2 without sacks). ISU completed 59% and BU completed 70%. BU scored 14 more points per game and 200 more yards vs those 5 teams. If RG3 is such a bad passer then ISU is not in a good setup either after losing AA.
RGIII is a great scrambler as we all know, but again Rhoads/Burnham know how to shut down the run first/pass second type players (see WVU's 2 losses in 2007). Baylor's general style will be to throw at our corners more than our safeties, and our corners are solid to very good. Also, we have LBs who excel in pass coverage and should be able to help against the slant.
Which is why we hired new D Coordinator Phil Bennett. Hopefully he helps things a lot, he should make at least some positive impact though immediately.
Defensively, Baylor sucks. They ended last season on a major skid. Their beast defensive effort in their last 4 games was 38 points to Illinois. Even in a some of their wins (and in all 6 losses) they got lit up like a Christmas Tree. They had about 5 of our Utah/OU type games.