You mean there were no shows exploiting moe in the past?
I am not sure if Kyoani went out of their way to cater the fanboys (btw, didn't even know there was a such thing as a mikuru fanboy
), but surely enough they didn't start anything new in that sense IMO.
Having cute girls in a show does not take anything away from its entertainment value either, though it can certainly be a huge bonus.
As for the three shows being similar/different,
Again, I don't think it started anything new, except it really exposed the tsundere concept to the masses. A very well written novel (the first volume anyway) with better than perfect execution. Bandwaggon fans or not, it is a very solid show at worst.
Lucky star is just way different from the other two, in fact I fail to see any connection other than having an ample amount of cross-reference to Haruhi, being a comedy that relies heavily on parodies and references to other anime.
There were classics like the Galaxy Angel franchize where they do ABSOULTELY nothing. Why would they have to, having a monolithic plot just doesn't jive with this kind of comedy, or whatever type of show that does not need to rely on a plot. What about Excel Saga? Does this show need to have any strong "TEH plot" to shine?
At least both us can agree Miyazaki's works are no good