I once did see a gender-reversed one (Queen Lear, with sons, you get the picture) which was sort of interesting, certainly as regards the woman-hating bits. But in other ways, not at all interesting - suddenly it was only to-be-expected, in a dull way, that a matriarch whose power was waning would do destructive emotional mindgames with her children. Which then made you go back to the Shakespeare, suddenly seeing the originality of Lear as yer male protagonist.