TCP
You´re right, before landing you better check your landing weight to be below maximum.
For me it is a waste of money when on two of three landing weight restricted legs you have to do an approach with speed brakes extended to get rid of fuel.
All this when you knew allready at planning stage you would seldom use the calculated or "legal burn off" because it was calculated to cover the most conservative case - being the longest departure plus the longest arrival.
Max