Haighus makes a fair point, I was a little harsh on Reach and ODST there - Reach was my favorite game in the franchise, and ODST had a great sequence of fighting alongside an Engineer. I really dig human/alien alliances, so human/well-designed alien is a bonus. I suppose I was feeling a bit down on the franchise after marathoning Halo 4 - great gameplay, but I found a chunk of the changes to be a bit uninspired - humanoid robots as a new foe, relegating our Engineer allies to an audio-only Easter Egg etc. On the note of Hunters, I tend to have mixed feelings on sci-fi that includes theoretically nonhumanoid critters but squeezes them into a humanoid mold (the way they're used as embedded pilots for the Scarabs is pretty cool, though).
Yeah, I'd love to see the Q'Orl in some form - picked up a few bug alien toys (Halo, actually - their megabloks stuff offers some useful bits) to turn into Q'Orl eventually. One of the better insectoid alien designs out there, even if they are using the tired old Hive/Queen etc motif. Fun fact; eusociality (a hive of related organisms working to support and protect a single breeding female) isn't exclusive to ants and wasps - the Naked and Damaraland Mole-rats also function as a hive.