There's been talk of tweaking the wild card system during the off season -
The most popular proposals seem to be adding a 2nd wild card in each league & having the 2 wild card teams play each other in a 1-game playoff or limiting the wild card team to only 1 home game in the 1st round series.
The problem with these ideas is that they're based on the assumption that the wild card team is always inferior to the 3 division winners. And this is clearly not the case. Just look at the Rays & Yankees.
Here's an area where I think the NBA actually got something right for a change. In the playoffs they seed the teams according to record. If a 2nd place team is better than all the other division winners, that team gets treated as such in the playoffs, which is as it sholud be.
A closely related topic is going back to a balanced schedule, which should also be done during the off season. Because I'm much more interested in giving the best teams the best chances to advance and face each other in the next round than I am in the artificial construct of division rivalries.