To make it clear, I have no problems with purple haired people, trans people etc, I'm a thoroughly pleasant chap to everyone I meet and I've met and known some colourful characters in my time, where the line is crossed and all gates are open is when these people attempt to impose their skewed view of the world on me or others.
Of course an alien furball doesn't need to look like some lunatic with tits in a furry suit, but we don't have pictures of the original designs he disagreed with and only have the assumption based on his public persona that it wasn't gender neutral enough for him. Lets be clear here, the final design looks perfectly acceptable and so what if there's small nudges of femineity in there it's what helps differentiate the "sexes" for the vast majority of people, artists have been doing it since they put pen to paper ffs so why should we change it now to suit a few radicals who want to remove what makes a female a female in the physical sense.