Trivium: Good Or Bad?

One of newest metal bands from the states is definitely Trivium. Good guitar playing that reminds them of the metal they grew up on. The album " Ascendancy" was a huge hit with songs like " A Gunshot To The Head of Trepidation" and " Like Light To Flies" was some of the best songs from the CD. I suggest check out " Dying in Your Arms". It doesn't have a video but should as far as I am concerned.
Now theyare coming out with a new album but it is changing. Is that a good or bad thing? Matt Heafy ( the singer) is going to stop screaming. I think it is a good thing but when I heard the new song " Detonation", it sounded like the biggest Mettalica rip off ever ( at least the first half, the second half was much better).
I think Trivium should try to be different from album to album without sounding like Mettalica riffs. That is all.