I think bridging the gap between how often you need to stop to play level catch up to the story is sufficient enough to 'condense', perhaps they can involve other measures like allow flying from the getgo for the more dated expansions so people have an easier time getting around, and aren't needing to get aether currents later on.

ARR story condensing only worked due to how much actual useless filler it had which ultimately had no bearing on the storytelling later on, but as this goes forward, doing this in HW/SB, and most especially Shadowbringers can easily result in the overall narrative feeling very fragmented which is not good, especially for an MMO which already has a heavy focus on storytelling in the first place.