Posts from RTF is a global modification that replaces all towns in the game. Auto-translated

Regarding the faceless ones – IMO, it’s silly to reduce their speed (this was discussed on the stream) – teleportation is TELEPORTATION, not flight. They should, in theory, be able to move to any point on the battlefield, regardless of their location. That is, the speed should allow them to move diagonally across the largest arena (during combat). To maintain balance, you could reduce their initiative to 8-9 and reduce other stats.

What about devils, vampires, and thanes? Should they also have a movement range covering the entire map?

still, it's better to reduce their speed, because even with the ability to emerge from any shadow, they can hardly determine that they will emerge in a safe place and not end up in a meat grinder, and in the sixth game, they didn't teleport that far.

The speed should be kept. Hit and return + speed is the main purpose of the creature. Without them, the main idea will be lost.

What's the problem with high speed? Any archer/caster in the game has infinite speed. Moreover, some of them (archmages, high druids, forest archers, regular archers) also have decent damage.
Conclusion: within this game mechanic, everything is balanced by other characteristics.

Increasing the speed of flying units could increase the demand for spells like Fireball, Crystal, and Wall of Swords; this would be interesting, but the number of elementals would have to be reduced, as it would be too powerful to have 2 flying units and a caster at the start.

So, are they planning to add cabins?

What about devils, vampires, and thanes? Should they also be able to move across the entire map?

yes