A decision based on what? Finding Alison a better partner? Pedro and Bruno are probably going to win the 2013 World Tour (if it is a different award compared to the overall season winner) and have been the most consistent Brazilian pair on the Tour this summer. I see the decision only in favour of Alison and no one else. Btw, do we know if Emanuel is going to play next season as well?
There are two interviews, one with Bruno (globo.com) and the other with Pedro (Lancenet!).
I guess there are some things kept dark and will be hard to find it out. I'll only try to clear up what they said.
Both said it was Bruno's decision. Pedro decided to take a break now and Bruno decided on splitting.
Bruno denied he is going to play with Alison. He said he will plan for 2014 with his coach yet. On the other hand, Pedro said Bruno will play with Alison because both live in Vitória and will be better for them. Pedro added he is planning on to decide his new partner next week.