Guild Wars 2 is adding a great feature on already a great game that doesn't punish you by not being on it at the same time.

Is contradictory that the director of XIV says "Leave and play other games".

But then you lose on the chance of participating for a items, events, achievements, etc which really have no reason to be time-gated/one-chance only aside the fact that it generates a false sense of value derived only from FOMO.

All events, rewards, achievements, etc, should be aviable to obtain based on a reward structure that allows to get those through participating in the content which should be always aviable or return recurrently and/or through a complete economy based on rewards of already existing content to get them.

This of course speaking only from 2.0 onward.