How long is your play time for the entire game? I saw the realy small map and a bad statement:

Nevertheless, it is striking that the size of the game world long ago does not reach Arulco (Jagged Alliance 2). When asked about this said Thomas Lund (CEO of Full Control), that this is basically true, but the budget of the title would have no greater game world approved.

..

I have not managed to play through the entire game (dying or bugging out) but there's probably about 4-6 hours of content in there at most right now.  I don't know what their final target for content is, but I'm not expecting more than 8 hours in a straight playthrough.

It's way more than 4 hours. And they keep adding quests (I've checked the JSONs, the quests doubled in 0.7 compared to 0.6).

Not considering restarts, you will probably get about 10-16 hours of gameplay in the release version (maybe more). If you want to rush straight for the win, you probably can get away with less, but I doubt you will manage to reach game end without good gear.

I would say 20h - 25h

Could be 25h but can't say for sure because so far either the world wasn't complete or my testing run ended in a fatal bug so I basically never ever completed the game. Not that it was the purpose of the testing... finding bugs was more precious.