Exile map is kinda bullshit, Scorpion has no place in that map and I hate blue team having the Gauss hog. Don't give me that "scorpion is closer to red team's base" crap, that's not real balance, plus scorpion is bleh in that map anyway. 2 Gauss hogs would of been much more fun.
As for loadouts, I like them, although I'd prefer if they had classic halo gamemodes to have the old style as you mentioned spear.
DMR is kinda overpowering. Quite frankly I hate how ranged weapons have a slight edge over assault "rifles", especially with the DMR. It is fairly balanced, but combat kinda favors long range. The sword, hammer, and shotguns are worthless most of the time as most of the maps are just too damn big for proper close combat.
Ordnance drops are nice, just don't like how you still get a hammer, sword, or shotgun as an option in a big map that encourages long range(and there are many)
Don't mind the addition of the alien weapons, light rifle is kinda dumb being a DMR/BR hybrid but all the others are fine and add their own style. The pulse grenade is absolute shit though, shittiest grenade to go for of the 3, not to mention you spawn with 1 less grenade if you pick that as your grenade compared to the other grenades.
Some other things I could talk about the game, but I'll keep my peace for now.
The irony of guns, is that they can save lives.