Except we can't world-hop to other Shards even if we wanted to - the original means we entered the Void/Thirteenth was through a dimensional rift originally engineered by the Cloud of Darkness and her Covenant to Xande which Cid and the Ironworks used magitek technology to brute force open - destroying her and Xande cancelled the Covenant and caused that protal to the Void to completely collapse (yes minor rips allow Voidsent to enter the Source but they have to always possess a physical host in order to complete the 'jump' so to speak). And the way the Crystal Tower became the Crystal TARDIS and ended up in the First is also now unrepeatable, as we destroyed the mechanism that made that possible during the Twinning.
So both means are now unrepeatable - the Crystal Tower just will be going nowhere fast from now on and simply never will be dimensionally travelling again. We can still travel to and from the Source to the First though due to our aetheric trails between aetherytes, but the Tower simply will not be doing the same.
No, I think it's pretty clear we won't be doing any more dimension hopping I'm sorry to say as the ways we have done so in the past are now gone and no longer available to us that could make travel to the other remaining Shards possible, if even hypothetically. There is just too much now demanding our attention on the Source now as it is so we really don't have time to do further Shard-hopping, that's just facing facts.