What peaked my interest among other things in the article about his days dealing with X-COM's ups and downs, was the bit about Chryssalids planned evolution with the title Genesis that didn't see the light of day (sadly).
Supposedly, besides the stock Chryssalid we all know and love, there was proposed to be an ability in this new variation to make new Zombies, and subsequently, new variations of Chryssalid for every alien as well. The thought here I suppose was that there would be occasion sometimes to have Chryssalids freak out and harm (or I should say modify) their own side.
There are a few pictures in the article too, one showing a Chryssalid-Ethereal hybrid which looked kind of neat.
Scary to think too that not only would you possibly have a creature with its traditional melee attack ability, zombie-making ability, but on top of that psionic ability

All that aside, I can't imagine all the different possible combinations of art assets for every probable zombie offshoot and Chryssalids to go along with. I wonder, for anyone that's seen the latest games, if anything remotely like this was in any of the After X titles.