I would say, this is how they mismanage traffic.
Yup.
An offset in the real world is either for avoiding the wake turb
of aircraft (depending on the current winds experienced) or to
avoid weather such as paralleling a squall. On rare occasions
it will be temporary notam'd for short-term ATC purposes.
If early descents for crossing traffic etc are the norm it should
be promulgated in local AIPs. To date I've never seen any.