Yes, at the moment the amount is not stored on either the receiving addresses (nor on the send addresses).

It is difficult to generalise how the addresses are used - one person might have an address for an item, another might use it for dealings with a particular person or another might use each address only once and not want ANY extra information stored with it.

To store a given amount with the label + address is equivalent to saying "the address describes a thing with a certain price" i.e it makes the list of receiving addresses into a "catalog of items for sale".

I get the feeling half the users would want it, half the users would not want it, and the other half would be undecided !  :-)