The methodology of appointing (or deleting) elders & ms is a curious process. Several times I've been on the wrong side of a vote (either in favour or against appointment) and it isn't fun. The idea that decisions are reached unanimously is a convenient fiction - a straight majority vote or tie with the CO being in favour (which he usually is , as he has to put on his report the names of new ms & elders and it looks good if brothers are seen to be "reaching out") suffices. I personally was held back for appointment both as a ms and as an elder for the most trivial reasons and only discovered the real reasons years later. Sadly , communication with the unsuccessful candidate is usually poor - they are rarely told of the actual reason (usually because there is disharmony).
One of the problems with appointments is that if there are any doubts , the line of least resistance is to "give it another six months". This can be repeated an-infinitum with "borderline" or controversial candidates , until the candidate gets fed up and stops trying , or moves away.
Generally speaking , I reckon there are 3 kinds of elders - some who will appoint just about anybody , and who often act as cheerleaders for particular candidates. Most will simply nod agreement with the prevailing view. Some - often the self-righteous ones - would never appoint anyone. I recall asking an elder if Jesus was under discussion to be appointed , would this elder vote in favour of his appointment - and the elder took umbrage at this "slur".