I really expected them to play with the RAAM and Kim encounter(s), but it was just so passive. I didn't want it to be obnoxious, but I did want it to reference frames from the first game. Valera's death was so passive, and had no drama to it. It was just, "hey, rather than shoot you, I'll use my blades...and that didn't work. Hey, is that your knife in my chest?"
I wanted Kim to watch it like Marcus watched him die. Instead it's just a glance to Kim who sees her die, while he stands out of cover, and doesn't seem to really react. Honestly, it probably would've been much more appropriate had RAAM have come up behind Kim, and she then sacrificed herself, trying to free him. That might have made it more interesting, seeing as how he initially costs someone their life, which could explain why he's such a tight ass to Marcus and Dom.
Also, the end where he moves through a wave of Kryll, practically un-phased, while anyone else would have died within seconds of being attacked by the Kryll, just came across as lame. It was a desperation to make Kim look emotional, and instead further made me roll my eyes. It made less sense, too, as the blacked out sky would've made the Kryll attack even more ferocious and aggressive, but Barrick is able to calmly come to him and usher him off, rather than help him kill RAAM right there.
And if every member of Zeta team is to die, why couldn't they have killed off Jace in Gears of War 3. I know it's now hindsight on the developers part, but I hated his character in the full game. If he had driven himself into a gas station to save the lives of the others, instead of Dom, I'd have been completely fine with that.