I think the comment about Aliens making the Aliens less scary is a fair one. The movie itself doesn't do this, but like what was said, this was what was drawn out from the movie in later media. A small complaint that I've had about Alien EU material is that it sometimes puts across the idea that one Alien is an unstoppable force of nature no matter what, while many are no problem as long as you have some kind of firearm. That goes into another complaint of mine; it has often been shown, with a few exceptions, that as long as you have a gun with sufficient ammunition, you can take down an entire hive. AVP: Xenogenesis was one of the worst offenders, with two skinny hackers taking down hundreds of Aliens with an UZI and a 9mm, all the while tripping over stuff and arguing with each other. It reminded me of those old Jackie Chan films where he's screwing up in the middle of fights while still beating up the bad guys; all of the horror of the Aliens was gone. This kind of logic is acceptable for a video game, but should not be used in an official narrative story.
In actuality, taking on a horde of Aliens should be incredibly difficult, even with a company of the best-trained, best-equipped soldiers. One slight screw-up and you're dead, unlike Aliens Xenogenesis where it often seemed like the Marines were dancing through the hive. It seems to be like this new comic is looking to finally get things right; having a pulse rifle does not inherently make one any safer.