Next Expac feature?

[linayar]

I can't say I follow your logic on this; world visit was added well into Stormblood and before Shadowbringers. While "visiting another world" may sound like it's in the same vein as a traveling feature, like flying and swimming, it's more of a social feature. Also, flying, swimming(+diving), and TRUSTS are unlocked by playing the MSQ.

Yes, there are differences with world visit. (And the reason why world visit was unlocked before Shadowbringers was to test it during the "lull" before an expansion release.)

But, like flying and swimming, world visit is a "transportation" feature that is realized by our character in Shadowbringers (in the form of shard hopping between the Source and the First during the MSQ), just like our character realized flying in Heavensward and swimming/diving in Stormblood.

TRUST is way more unrelated a feature from flying/swimming.