ElAurens your tale is unfortunately all too familiar.
People are keen enough to give the game a go even amongst all the bugs and unfinished features but there are some critical faults that just can't be ignored. This is made even worse by the complete lack of fun single-player content which could have helped ease the pain during this no MP sound bug fiasco.
Yes the devs are working on it but it would still be nice if they fed us more updates and kept us in the loop so it makes it a little easier to keep the faith up and help reduce the number of complaints. A public bug-tracker also should have been set up from day one IMO (like what Bohemia Interactive has for ArmA).
The only thing this game has going for it at the moment is the FMB, and thats only if you can wrap your head around it no thanks to the lack of real documentation.