DC has writtenIt is impossible to estimate when the game will be released. So please don't ask. Same for the date of the next dev blog entry.
That also include how many % of the game progress is done
Stranded III Dev. Blog - Comments
DC has written
Assassin moder has written
DC: how big are maps going to be? (planetary, huge islands, like garry's mod, etc). I expect to see bigger stuff than just a 1km round island someday, though.
Starkkz: I'd like to see more than just islands
like forest, deserts (with some kind of a bounds like rocks?
). Being a Stranded just on an island will become boring I think, but wait.. Stranded? Boring? What I'm talking about.. 
We will see some new stuff like animales, or different islands in different contintents, or something like that?
DC: & @
Lobwver: I mean more like "closed" environment without a sea, it will be hard to do with generating but in editor would be easy.. never mind
Stranded always be original!
DC: did you redesign the trees? They look like from higher quality from the last screenshots, if so, what program are you using to make the models?
Starkkz: probably Milkshake 3d, like his last game
dorel12345: Plz, u English is horrible.. and It was here so many times..
do not ask him for that because it is unknown
DC: Hey, do you remember that I told you that UniLua supports FFI? It could be probably easier for you to use it with the S3 classes that you want to export, like player, entity, game object, etc. It supports methods and some more stuff. Maybe you have already done so much C# work and it would be pointless to rewrite it in Lua code, but I'm just saying that exporting certain C# functions to UniLua through the FFI module would just need a little of Lua code and less of C#. Just have a look at it.
Starkkz: I don't know anything about FFI. Could you give me an example? Thanks for pointing this out!
Pagyra: Huh.. finally a survival game I didn't already know and play before it was mentioned here. I'll take a look at it. Thanks for sharing
DC: I found this:
DC: you don't really have to expose too many things, you can just hide the variables or methods that you don't want the others to see. Just by adding the necessary fields would do a lot (coordinates, angles, player name, etc). Not to mention that these could be used to work with the already existing Unity classes, like the 3D vectors.
DC: hey, I haven't managed to compile UniLua on Unity (due to the fact that the code is super strict or because I'm doing it wrong) would it be much to bother if I asked you to make speed tests on UniLua and normal Lua? (I say normal Lua because every computer gives different results) Also, have you been successful at using FFI or did you not like it?