*I'd do 4.5 as is, but after reading your post it sounds like you're going to take care of some of what I'll have to say*
FNHR
Aesthetics: Very clean use of a forunner pallette. Beautiful meld of the red vs blue without it being tacky. Some spreading out, heightening, or repeating aspects of your architecture near the medium doors of red and blue 1, the crux of red and blue 2 and elbow, and the "tongues".
Layout: The 3 levels are very clearly spaced, and interact in very exciting ways. One of my favorite interactions is the way the lifts work; you can cancel and go for a ground pound top mid, go right and head right down the tongue, or follow it through for a quick flank on the opposition.
Weapons: Nice balance and nice placement, I can tell you thought it out. I would say the plasma rifle is a tad OP, there were many cases of cqc that meant instant death or trade if you had your team's.
Spawning: Forces you to move frequently to find your next victim; perfectly paced
