If the game was delayed, it is not because they want it as polished as possible.
Don't be naive
SEGA had problem with economy and all this crazy crysis.
This is why they intentionally canceled the Alien RPG.
If you don't pay a developer, they don't work on it.
So I'm guessing instead of "rushing" which is not that simple by the way, the game by putting 200 people on it working at the same time they favored a team of 20 - 50 developers to work on a largest amount of time while SEGA made income which could pay Gearbox.
Problems aren't unilateral and easy. Think of it.
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about this Alien size...
I'd rather an awesome gameplay than a total realistic Alien accurate.
Problem is both are lacking from the preview.
AVP2 was a good game and Map / skins / mods allowed the game lifespan to endure ten years even with server modification down. And all of this turned the game from Good (because of its action gameplay orientated) to awesome because everyone could find its tastes with whatever modifications and other extra.
And You all know that AVP2 had the most horrible lighting system, low polygon count, bad engine, wrong sized alien / predator and yet it didn't stop player to play it.
It's like bitch*n because in Left 4 Dead zombie hits you with their hands rather than eating you and so instant kill you.
Gameplay is above everything because that's what makes you play.