"2.Lt can act as both squad and platoon leaders depending on their experience.
A "young" 2Lt normally acts as a 2. in command for a platoon or as a squad leader, but a 2Lt with 3-4 years of experience (as a 2Lt) can act as a platoon commander. (5 years as a 2.Lt makes you a 1.Lt.)"
Do they get both squad and platoon leader training in sergeant school?
In our system after basic training about 25%-30% of company (suitable and volunteer) are sent to NCO course wich is divided in two periods NCO 1 and 2. Everyone does the period 1 (basic squad leader skills) and after that the best 10% are sent to reserve officer course and rests proceed on NCO 2 in their specializing training wich is here usually called "MOS". After NCO course (after 6 months training) all passed are promoted as undersergeants (corporal) and they start to train and practise primarily squad leader's tasks and leadership in their MOS on leadership period 6 months. Training on leadership period is fully controlled and a lot of bad immediate response is given by training officers.
After 12 months of training, package is copleted and they are booted out to reserve where military related possiblities are rejoining to military academy, SOF, frontier guard, assisting training officer (SSgt), MP, or service abroad.
"It looks like we're moving more and more towards professional soldiers now, and maybe towards NCOs as well."
Then one of the biggest problems: From where to get enough people to be trained professional NCOs and officers to fill wartime troops and replace casualties in major war? I don't know Norway's wartime strenght but i guess it is not far away from about 200-400 thousand troops. Quickly counted those troops would need about 100000 NCOs and officers to run the system and replace casualties (you know casualty ratio is higher among NCO/officers than basic enlistee). 100000 NCO/officers would at least immediately solve the problem of all unemployed people but who is going to pay the bill? Just half seriously kidding
