Well Tuomas Pirinen is one of a few ex-GW game designers that I rate, many are just name-dropping the GW connection and releasing poor games. With Tuomas you'll be getting a very good game but why, oh why, keep flogging the 'grimdark' thing - I'm kinda jaded on that schtick now and I absolutely loved Mordheim. I may pass on this one, at least for now.
Honestly it seems to have been market demand more than anything. Mike Franchina has been doing TC as his personal art project for over a decade now, and getting "we want a wargamme!" comments on it for just as long. Not always a guarantee that it will actually sell, but in this case... 3.3milion says it does.
That said I'm super happy to see it doing so well. Mike is paying his sculptors decently for one thing! (he better be, I recommended some of them to him myself!) and all of the crew working on it are great people in general.
That said I do kinda agree, "grimdark" seems to just be what is in fashion for the past 3 decades now.