It wasn't certainly the quality of warcraft, but it was getting there .....and you could use teh buildings,..of warcraft II if you had bought that cd...
But their arguments where the name:
what about lindows-windows.???
and the code showed some similarity(i suppose in technique):
but how did the developpers got those ideas you ahve to ask yourself then, if teh code is safely with blizzard? It was made public or it is a common technique....I don't think they do the effort to steal it

.