Sorry, but just doing a drive-by that says, "Trust us, we think this is wonderful, you'll love it, change your system to something that's even more complex and opaque to the voters than the current system" isn't going to convince many people. You don't really think that the voters of San Francisco (to give one example) spontaneously decided that IRV was great, do you? Advocates for the system worked hard to get it on the city's ballot and to convince the voters that they should change it.

I don't see WSFS changing their rules without a significant number of their own regular attendees being convinced of the need for such a change. And that's not going to happen from an outside source. Either convince some of the regular Business Meeting attendees or join Worldcon and come push the changes in person. WSFS isn't run by remote elected representatives or some far-off cabal; it's more like a Town Meeting.

And I'm Chairman of the next such Town Meeting. I'll help you frame your proposal and point you to the people you really have to convince to have any hope of getting a fair hearing. But either you or someone you convince is going to have to do the actual legislative work.