When in OCS, until the very last moment when the epaulette is on
your shoulder, you'll still be screwed by every single spec as hard
as anywhere else. Its quite simple, you aren't an officer until you
are one.
Anyway the problem with LCPs being promoted to CPL/3SG is that they
would need to be sent to BSLC/ASLC and that would seriously disrupt
training. Thats what the Sect. 2IC position is for, to train good
LCPs to take a junior leadership role. As for the lousy commanders,
I have nothing to say cos I've seen many terrible ones but I have
also seen good ones so I guess given the short time SAF has, it is
doing all it possibly can to nurture NSF commanders. However the
standard of most regulars are disappointing.
Another point to note: It would be hard for a non A leve/poly guy
to be able to grasp AOP/Topo/Technical stuff on top of doing things
like safety planning, RMP/RAWR, write out lesson plans and design
exercises, conduct training and write admin instructions. Remember,
there is a training/administrative side of army, not just the
exercise/warfare side.