I've played a few games now of DA, x2 of them as the Korath Clan. I've believe the germ warfare leading to the spore ship is a bit too easy to get straight off the bat.
Unless the AI is set to a vey high level it is quite easy to wipe the floor with one spore ship. I think the Korath should definitely have this technology, however, what if it was placed after Terraforming (or at the end of another line of research), beef up the research costs and have the spore ship available further on in the game where it can be a more interesting threat and the other races are better able to cope with it.
Also another race could be given the technology to counteract the spores, again a fair way into the game. This would make for some more interesting scenarios. What do you think?