Board Thread:General Discussion/@comment-24366751-20170604201315/@comment-5101200-20170606160417

Extra aliens are only really a problem when they don't add anything to the arsenal, such as aliens like Crashhopper who jumps when aliens like Big Chill who can fly exist. In this case, Gax adds lasers, so it's not that bad, but his strength doesn't really add much.

The problems are what Trigger said. Plus the majority of the art style.