when i went through medic phase was about 10 weeks, I think it's down to like 8 now. I wouldn't say calling it a several week CLS class is accurate (unless they took out a lot of stuff?), but it was pretty much all field medicine aside for a week or 2 of clinical medicine. Honestly I dont see anything wrong with that. A medic going to a line unit is going to need those trauma skills more than sick call ones since there's plenty of people (senior medics, PAs, etc) to look over his shoulder in the clinic and teach him. In the field on the other hand there wont be. I'd rather a new medic know his way around TCCC and the skills for that and be an idiot with assessing clinical stuff than the other way around. If a new medic goes to a hospital then he'll get that clinical time anyway, and the point of AIT is to get you to the point of being able to learn from your unit, not to be supermedic right out of graduation. Does clinical time make you better at your medical skills? Absolutely, there's no arguing that. But with the limited time for AIT and the possibility of going straight to a deployed unit, field trauma training is more important during that.
As for stethoscopes and needle decompressions there's 2 sides to that. The argument "I wont hear it under fire" is true but stupid: unless it's a prolonged firefight you shouldn't waste your time on that anyway. get a tourniquet on and go back to shooting, a patient isn't going to develop severe pneumothorax and die within a minute or 2. On the other hand it doesn't take a genius to figure out which side to stick for open pneumothorax. See what side the hole is on, cover the hole(s), and drop the needle in. 2 holes on your right side isn't going to fill the left side up with air. Even if it's not needed right then it allows you to move on to other casualties with having 1 less thing to worry about, so in that sense a stethoscope is a bit useless. Keep in mind this is combat medicine not civie medicine, civilian medics don't have to worry about going from a secure place to having to shoot back at a moments notice and military medics dont have a rig full of supplies. So yes in 99% of situations I'd agree that assessment is more important than interventions, however combat is a bit of an exception. Assessment is needed (obviously, how do you know what to do if you don't know what the problem is) but it doesn't have to be detailed and most of the time what you can physically see is a good indicator. See a lot of blood coming from a limb, tourniquet it. See an open wound to the chest and back, seal it and drop in a needle on that side. I'd rather have enough tools to treat what I can see (remember: limited space) than have extra tools to diagnose what I can't see and not have the equipment to do jack about it. Situation dictates though.