Leave it as is would be my vote. If anything add two teams and make all the teams play the first round but I'd prefer it to be as is. The playoffs have never been about making sure the best team wins. It's always been about getting teams that have the chance to win four series in a row against quality competition a chance to win four series in a row against quality competition.
I do have one radical, and completely impractical, change that will never get implemented but would be fun for fans. Have a set number of wins to make the playoffs instead of a set number of teams that make it. You can have divisions if you want but if they just had all teams play the same schedule and all teams that get to 90 wins are in.