Anima defeats the purpose of a seamless world.

[Renshi]

Heya!

I just got that a Seamless World is a world where you don't have to go through loading screens and whatsoever. Yay! =D
Anyway, I like the fact that they've removed the Zones, but as you say and you want to mean is that a Zones system gives more ways to implement content and has more performance zone by zone, and I'm totally ok with this.
I think, though, that the zones are already implemented. Not zones as you mean though, as they are just intended to not overload your computer by loading so many models of characters and what else.
I believe that if they use smartly this type of zone division, they're able to maintain the Seamless World concept having content that we'd like to have.

About the teleportation, yeah that may defeat the concept for some, but understand that the loading screen is for you to not see, for example, your character not fully developed or missing object/terrain. From what I've experienced, by the time you walk there, the computer keeps loading the world. With a teleport you're going into a place not yet loaded by the computer, so they put a loading screen for whenever you teleport.

I guess that the only way to fix this by not using anything like airsheeps or transportations is loading the place before actually teleporting, so:

1. Choose the Teleport
2. Load the place
3. Teleport with a fade effect or whatever.

Going with Hairships, Boats, Walking,... all these keeps the world updated and you don't have to go into loading screens. Animas at this stage do because you have to load the world around where you want to teleport.

Said that, Animas are our only way to go one place another instead of walking, and I'd NOT remove it for now. If in the future it will become useless, and we'll know when, then they could remove it, but for now I'd keep it.

See ya!