People rightly take this as a promise. Why? because the language used is absolute. There is no room in how they told us this for “not actually in December”
Nowhere do they say “we havent actually finished developing this yet and we hope it’ll be done in time for a release in december, but it might not come because of everything else we are working on”
Instead they said how excited they were to give this to us in December, like they have a plan for its release. People took this as meaning it will be available in December and Fatshark have only themselves to blame for people thinking that.