D and Gr
I agree with you-- it should be mandatory. In NZ (I'm now in the UK) we did just that and I think the benefits outweighed any effort spent. I think another factor that I have noted here is that of newbies to jet aircraft-- often very concerned about getting high and fast . I often observe these people slowing VERY early in the decent without good reason. All that is needed is a bit of training and as you say- a bit of thought about what is going on at your end of the operation! This sort of forum can help a lot although spoilt by the patronising attitude of some pilots !