I'm not sure why you are "shocked" about there being no staff on
platforms at off peak times. This is the norm at almost every tube
station with the exceptions of Victoria and those stations on the JLE
where there are platform edge doors. I'm struggling to think of anywhere
else on the system where constant staff presence is required on
platforms solely to provide passenger advice.

Well, maybe "shocked" was a bit of an overstatement, but I did think
that it would be a nice touch to help direct people who seem to be
incapable of reading our signs, which are better than any other Metro
system Ive been on before.

This is also true of Metro systems all over the world that have much
lower staffing levels than LU possesses.