First of all i would like to say that i would not change anything but i would add something additional to the ongoing work/plan/environment with my experience and skills.
In every type of company basic things are.
Customers satisfaction.
Employers satisfaction.
Benefit to the company.
If those criteria is satisfied and changing according to that than I will go for changing.
Sir may be there are so many experienced persons in board. May be they know something better than me. So I respect their ideas. There is much difference between changing and updating. Where changing results good outcome with bad. And where as updating results more productivity and innovative thoughts. So I will update the process If I came on board.
First of all I understand the company goals and environment, if there is any changes needed than I will change by taking suggestions from the respected experienced person for effective results. Apart from that if no changes needed than I will give my best to the company as a board member.