One of my favorite updates to the game
(Not sure when it was implemented) has been the swirling vortex. Some of the things that I have found about them are:
1) The
destinations appear to randomly change about once a week. They all appear to change at the same time (Confirm.)
2) They rarely go over about 6 'destination strings' long before looping. These loops do not necessarily loop back to the 1st SV that you entered and loops are usually 2 to 4 destination strings long.
3) A fully repaired fully loaded rowboat with one player on board will take anywhere from less than 25% damage to 75% damage but rarely takes more than 50% damage. However, add another player/passenger to your boat and it may take 100% damage on just one jump!
4) The destinations can be as far as from one corner of the world to the other and distance appears to have no effect on amount of damage taken.
5) I have personally found approaching 70 of them this world and estimate there may be as many as ~90.
6) You can carry another rowboat over your head while in a fully loaded one and the one above your head will take no damage from jumps Could be a lifesaver you know :p
*Not sure if a raft or coracle can go thru. I tried loaded and unloaded raft and was unsuccessful.
As implemented I love them for the random exploration value and the temporary ability to have an early game route to somewhere far away. Early this world (before I knew the destinations ever changed) I found a route from basically the NE corner of the world all the way to AP (Near the SW corner) that took right at an hour.
Personally, (No surprise to anyone that knows me) I'd love to see them still the way they are but, have them, or perhaps some of them, go to different maps entirely. Say perhaps a map maybe 1/4 the size of the current world. These new areas

would be only accessible thru a SV. They would have a few SVs in them that would be local in destination and function as the others but they would have 1 or maybe 2 that take you back to the larger world..
What could go on in these worlds? What could be different? Harder mobs/dungeons... Better loots, unique quests...? I think if done right it could add a lot of fun and many challenges. For instance: Can an SV currently be claimed?
Imagine the strategic battles over them if expanded upon in some way...