I believe that there are enough hours in a day, days in a week and weeks in a year that all music genres can be effectively accommodated for everyone's listening pleasures.
Failing to establish program blocks might do both the station and the listeners a disservice. And there is nothing to stop the station from establishing a rotation of the blocks so that listeners are exposed to a genre they might find surprises them pleasantly and vice versa. As well, no one wants to have to wake up to listen to their faves at 3am all the time!
Just something to ponder.
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Not sure if I have free time...or if I just forgot everything I was supposed to do!