The really bad thing about BRs is that they give the leading players in a race even more chances to win, and the bad even less.
Who's once in front of the battlefield can restore his energy without big problem,s thus make a lot of BRs.
And those who are already fired from all sides try to keep that bit of enery that's left, have no real chance to execute BRs at all, making the distance between the leading player and the last even bigger.