That was bound to happen sooner or later as their character was explored more deeply starting at Halo 2 (from the gaming perspective).

The people who are writing about them are human, so I think it's normal that things have wound up on this course. How does one write about something they don't know? Eventually "we" seep into the characters.

Seems like every Alien species (regardless of franchise) ends up adopting one human-like archetype that ends up representing their entire culture and that ends up being the best we can do.

Elites = honor bound warriors
Brutes = barbarians
Prophets = self serving preservationists- corrupt government
Jackals = opportunists\shady merchants
grunts = uneducated proletariat cannon fodder

If a series wants a character or species to retain some of that alien feeling, they should stop giving them the ability to speak English.

That's why to me, the Drones and Hunters still seem the most alien- when they talk you can't understand them. They've never had English lines in the games. You can't give them lines (Halo 2 forward) and then take them away (Halo Reach forward) and expect it to be the same.

Oh, for the days of wort wort wort