Flash CS3 migration: Still use AS2 publish settings bad?

[similar post in Flash CS3 forum but I thought the AS3 community might have some input]

Hey all,
My company is switching to Flash CS3. We do pretty basic interactivity…nothing ever requiring external classes. The designers I work with occasionally have to help me out with flash when we get too busy, but they aren’t coders and therefore they don’t want to use AS3 publish settings so that they can still have code on buttons, simple on(event) code, etc.

I want to argue that they should learn basic AS3 for the sake of posterity, but I can’t come up with any really good reasons since the stuff we do is pretty basic.

Is it a bad idea to stick with AS2 publish settings?
Any input is greatly appreciated.