I am one of those who absolutely adored Studio Blur's work on the graphics for Halo 4 and Halo 2: Anniversary Edition so the new graphics direction they are heading in is not impressing me at all. Just compare a brute between Halo 2: Anniversary Edition and Infinite.
I'm also not a fan of the open world aspect. If there was one series that did not need to go that route it was Halo. Considering that it is heavily story based.