I have no problem with teams containing M&F members just the ideas behind these new events.
Maybe my reading comprehension is lacking, arent these normal relays that just are mixed gender? The 2x2x400 is just a 4x400 that has 2 men and 2 women on each team, right?
Maybe you could explain what you dont like about them?
They're direct head to head races, so should be pretty easy to follow for spectators, so that seems positive. They're a moderate length, so should be watchable for casual fans.