Well I have tow major problems with your rant (well, not major. or problems really. More like concerns or issues)
First of all, there are no female orks. Technically, there are no male orks either. check the back of the codex, they are a unigender race.
Second, As far as I can tell, an all female Eldar army would be nothing special, as half the models are female anyway. Just take banshees and only use female guardians.
The Ig is a pretty good idea though. (although I am far too lazy to go about such an undertaking)
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