i also do a lot of reading.
it doesnt seem to me that the men have expanded amount of characters either. they seem to be the macho/victim/sad/loser. or macho/hero/strong/winner
i imagine that there are formulas that are perceived as successful and thinking it is what the people want. go outside of the characters we have established and readers wont want to read
honestly, i find a lot of male readers hard to read. especially the kindle writer. not near all, but a lot. they write from what the conditioned male is suppose to see of females.
there have been male writers i read once, and so misogynist i wont go back. like the male movies, the female character is always servicing men.... never quite a person. the stripper or prostitute with a heart.
but then there are writers like sandford who tries not to be that writer. you can hear in his writing being the progressive man, but every once in a while it will come thru.
i really enjoy the male writers that simply dont have it in their writing like childs and koontz.
it is interesting how the men you talk about want to perceive women. a reader can hear that in the tone of the book.