I like the approach Ed Boon laid out when it comes to balance. They really want to see as much of the cast used as possible. What I got out of this interview is that in the next game, they are going to look more into buffing the low tier as compared to just nerfing the top of the crop.
I'd say it's a smart move. What gets people exited for patches is not as much seeing a said character nerfed, but the lower tier also being able to hold their own against the best characters. Nerfing the top tier is good, but seeing characters that struggle able to compete breathes new life into the game. I hope more emphasis goes toward aiding low tier characters as compared to dealing with the top (which should still be done, just more focus on low tier characters).