The unguided weapon is depended on ATO and airframe. Right now F-15Es are NOT using unguided weapons, but teh A-10C are using Mk-82s with DSU-33 (Airburst).
I'm not Steve, but there are approximately 20-40 different combinations they would have to model...all for the same effect.
A list of all weapons with a Mk-82 500lb effect.
Mk-82LD
Mk-82HD
Mk-82LD airburst
Mk-82HD airburst
GBU-12
GBu-12 airburst
GBu-38
GBU-38 airburst
GBU-54
GBU-54 airburst
Mk-84s are even worse
Mk-84 HD/LD with/without airburst
GBU-31v1 (airforce) v3 (navy/marines)
GBU-31v3 (airforce) v4 (navy/marines) (penetrator)
GBU-10 (with delayed fusing/airburst/contact)
GBU-24 (with delayed fusing/airburst/contact)
GBU-15 (Rocket assisted gliding bomb)
There are four different Mavericks, and multiple rocket combinations.
I too want a more accurate loadout and a way to choose them, just like real life...however, I would like to point out that its not just as simple as GBU vs JDAM.