Here is an idea for Siptah. Revamp it by adding a volcano and some snowy mountains, and some jungle on another side of the map or something with a river…or an instance that is underground under the tower in the center. The snow/volcano/jungle biomes are missing from siptah. Also, include some obelisks or something for fast travel around Siptah. What if…the power in the Leyshrines to transport thralls from the Exiled Lands…were able to also teleport the player around the map…or…back to the Exiled Lands? If they can teleport thralls, why not have some new ‘discovery’ through these powers to be able transport players? The bounty hunters have studied sorcery now for a while…maybe they could discover transport from one server and back and forth like the teleported thralls. The fall into the Well of Skelos seems like it ties into this sort of thing…perhaps one could jump or run into a different portal somewhere…and teleport. Of course…a Siptah and a Exiled Lands server would have to be paired to do this…but it would make things interesting and tie things together. Volcanos, mountains, snow, jungle…Hellish caverns with lava on siptah would be a cool way to use some of that extra map 
Please understand this in the manner it is offered, as information not a commentary or criticism.
The production team has already stated Siptah development is complete. When they did not extend the Age of heroes to Siptah, it was because they have decided that no additional development will be provided for Siptah. Game features that are plug and play may be added to Siptah, but no map modification or new game systems are currently planned as additives to the expansion.
Thanks. Plans and minds can change, however. Fingers Crossed. 
Siptah is an amazing map, dudes who designed and made it - give me your address I will ship a crate of vodka to you.
Too bad that is has ended this way… I hope they are going to release Dune as a playable, bug free game.
As a devoted Siptah player I don’t like the idea of a Volcano biome because currently the Volcano on Exiled Lands is used to exploit and cheese purges.
The teleportation between maps is essentially a transfer system of your character and transfers have been disabled for a few years now. Everyone always asks and it’s never addressed.
Finally a travel system isn’t needed on Siptah because it literally takes less than 10 minutes to ride on a horse from 1 side to the other. Don’t be lazy.
Great ideas! Expanding Siptah with new biomes and fast travel through Leyshrines would make the game more immersive. Sorcery-based teleportation sounds like a perfect fit! Also, if you’re interested, check out Read Surah Yaseen. Looking forward to more discussions!