Just tried out the mission "Sierra 117" there. The weapon variety is simply awesome (Infinite's weapons work so well here, and I must thank you profusely for the inclusion of CE's Pistol and AR), the Covenant are also more varied, and overall this is a really great design direction for a Halo 3 overhaul. I think this and your Halo 4 overhaul will in the future become the definitive ways to experience these games with a fresh coat of paint.

Unfortunately, I was not able to actually finish the mission due to a number of issues:

1. There were some oddities going on with Sgt. Johnson, namely that after he says "C'mon you dumb apes!" it took him way too long to utter the next line of dialogue "You want breakfast? You gotta catch it!" than he usually does. As in, he said the first line in the usual place, and then the second dialogue only started literally right before you get the cutscene showing the Brute Chieftain locking him up. Which leads me to my next issue...

2. The cutscene which features Arbiter saying "See how they bait their trap?" and pointing down to where the animation should play of Johnson fighting back before the Brute leader knees him into the building where you later rescue him... hilariously had Arbiter pointing at nothing happening except the Brute walking calmly past a Sgt. Johnson who wasn't even there. No animation played and the scene just ended. This also had happened earlier where the Brute is supposed to kill the Marine who tells him to "kiss my ass". I rounded the corner, expecting to see the scene play out where that killing happens... only to see the Brute just standing on the log with a bunch of Grunts, and the Marine calmly strolling up to me as though he and the Brute had talked it out. Going back to Johnson, the ultimate issue was that as I made my way over to free him by unlocking the shield wall, the shield itself was actually turned off already, Johnson was nowhere to be seen, and despite turning the shield on and off again multiple times there was no way to progress the mission.

Also, just as a nitpick, Ravarrus is a cool boss fight, but I think the hammer should be taken away from him. It's far too easy for him to go into berserk mode and knock everyone including Arbiter off the small walkway into the water where the major fight scene takes place (which is awesome btw, fighting a group of specialist Elites and Brutes with swords and shields is epic). I played this on Easy just to test it out, and Ravarrus single-handedly wiped out a whole squad of marines + Arbiter (and potentially Johnson) by smashing them into the river.

Sorry for the block of text. Just wanted to give as detailed feedback as I could so this could get fixed.