ATTN Zuffa: Ideal Rules

I've been a fan of the UFC for a long time now, and over that course of time have seen many rule changes (headbutts, knees, etc.). Some of these changes seem to have been made to appease lawmakers, while others appear to have been made voluntarily in the interest of fighter safety.

When creating rules, what is your ultimate goal? As it stands now, would you say you are happy with the rules in place? If not, what changes would you like to see, and are you currenly lobbying for them?

Thank you.