I think the semi-epic music doesn't fit the fight scenes. At all. Not every trailer needs orchestral music.
Lol! They had that same music playing while farming and mining, and it's that it continued during combat that bothers you? No, I agree that orchestral music doesn't have to be in every trailer (and certainly not in this one in particular). But the small bit of the trailer where there actually was fighting was probably the ONLY part where the music fit (well, it was dramatic -- pretty much like combat can be, and pretty much how farming almost never is, unless you have some REALLY HUGE aphids.
Well, most fan-made Minecraft trailers have epic music aswell, but it fits the "build what you want"-part, but not really the mass-genocide of zombies.
I am not sure this fits this topic or not, so feel free to ignore it entirely. ToME now has a trailer and a 1.0 version has finally been released! https://www.youtube.com/watch?&v=mKpYy-pwRfM And here is the site of the game. I will blab about the 1.0 in the "What games are you playing and why?" thread. http://te4.org/