I don't think that changes need to be voted on by the members but should certainly be discussed by the administration, event committee and the executive board. Input is always valuable and no event chair should be making major changes without it. That being said, change is not inherently bad. Traditions may need to be reevaluated to see if they work for the current school community and be adjusted accordingly.
Our PTO has volunteers who coordinate and run events, fundraisers, book fairs etc. My question is, if a coordinator wants to make a change in hours a function is run, or eliminate a long time tradition at a fall fair, do they bring it to the members and have the members vote on these changes, or can they make the decision on their own?