This is such bullshit.
Halo was always graphics powerhouse
I mean kinda no .. right ?
Halo stopped being considered a graphical power house as soon as the first reports of Halo 3 not being in HD started popping up. It's no different than what we see now, if the game doesn't meet a resolution metric, it's terrible in a lot of peoples eyes visually.
Reach was maligned for its terrible ghosting.
Halo 4 clawed some points back, that game was a 360 showpiece.
Halo 5 was also received kinda meh visually, but praised for its 60 FPS focus.
To me, whenever I recall past things about Halo, it's almost always people talking about the game play first.