I for one am very much a fan of division winners getting home field. The only two times this decade a team without a winning record won their div, they one there first playoff game. It puts a bigger stress on division matchups and teams building there roster to beat the fellow div, thus keeping strong rivalries.
and on the other side, if the 4th seed really is that bad- I like the idea of rewarding the highest wild car team with the easiest game anyone will play. If you couldn’t win your division I don’t think you deserve a home game. You get the easiest away game. seems pretty fair to me