Not only would his departure be devastating to the close-knit congregation, but it would cause financial hardship on the church. You do not say whether you want any comments or just a sympathetic ear. I have stood in your shoes with that same elder here 2,000 miles north and east of you over many topics in the past and present. I am fortunate to have a group of local pastors in the community that I am able to commiserate and celebrate with and we are a tremendous support for each other. Mutual support and accountability seemed to be part of the original 12, too.
Discernment is necessary here.
He is a good pastor, but this was not his correct call. You are preaching something of a change for people, especially for this elder with long tenure. Change can be a discerning situation when looking to understand our flocks. He is still one of the children, though, regardless if he stays or goes. Maybe it will help with your discernment too, as good as Friedman s Fables, I think.