That is a nice idea. The ability to commit apostasy is part of Methodist doctrine, though it is seldom discussed as turning away from God entirely is something between the individual and God. Only God would know for sure if someone committed apostasy rather than just having a failing of faith for a time.
If fact non-Methodists worry way more about Methodists views of apostasy than Methodists do. I've never met anyone who I believe has actually committed apostasy. Even people who say they've stopped believing in God seldom really mean that. Often they are in a moment of pain, grief, or suffering that makes them feel lost. But that doesn't mean they are lost. If they have even the faith of a mustard seed God will save them because even that small faith is a gift from God.
Apostasy is a very conscience decision to say, "I don't want to believe in God, follow God or serve God now or ever." It isn't backsliding, or having doubts, or human failings. Actual apostasy is so very rare that it really isn't something Christians should worry about.
So while Methodists don't believe in OSAS, we also believe so strongly in the never ending love of God that the value of OSAS pales by comparison to God's desire to guide us, love us and redeem us.