From an arbirator that you picked and two neutrals perspective.
Check with your merger committee. They insisted on Nicolau. Our merger committee did not want him but our MEC chairman went around them and told the attorney to concede.
I know you won't believe this but even so, the arbitrators were chosen in a manner similar to picking a jury. Nicolau was your mc's first choice. I am sure you can find the documentation if you try or simply call one of your mc members and ask them.