Just lost a rider here in Kansas, too. Part of a group ride--two are in the hospital and one was killed. Sad. I'm currently updating our squadron roster of riders and double checking paperwork. No sense in giving Uncle Sam any reason to keep your SGLI. Ride safe, fellas.
Hopefully the AF riding requirements (MSF BRC, helmet, IPE, etc.) help young airmen avoid clearly unsafe behavior like illegal street racing. I'm sure it happens, but I have to believe that most riders are responsible with their bikes.
If you're previously fluent with the language then you'd probably be best served by looking up some German language podcasts and listening to the news for a refresher. I lived in Spain for several years when I was younger and became pretty fluent with the language. I hadn't studied or spoken much Spanish for a decade and went in a month ago and scored a 2+/3 with little more than listening to BBC podcasts in Spanish for a week. German is probably a harder language than Spanish though.
DLPT scores are recorded on the officer promotion brief starting with this year's Major promotion board. You can retake the test in six months if you don't get the score you're looking for. It seems like a 2+/2+ would equate to basic fluency, a 3/3 would equate to an "undergraduate" ability, and a 4/4 to a "Master's thesis" ability. For a 5/5 you'd better be ready to defend your PhD dissertation.