Flash CS4 vs Flash CS5 Actionscript - Should I upgrade?

From the perspective of coding, wh开发者_开发技巧at are the major improvements from Flash CS4 to Flash CS5?

Looking at the list of new features, there a couple of handy ones for coding:

• Improved Actionscript Editor - you can get autocomplete for custom classes, similar to Flex/Flash Builder

• Flash IDE - Flex/Flash Builder round tripping:

Don't know how handy the Code Snippets is, but I there is a CS4 Panel available. I think Julian Dolce showcased some round tripping between Flash IDE Flex/Flash Builder using Ant at FOTB '09, but don't know the url. You might find the mobile profiles handy or the TLF integration as well. More features here.

I would recommend you to get the CS5 trial and give it a try. If you are mostly working with AS3 code then the upgrade could be better. I was using flash-builder( on as3) + cs4 (flash timeline) but the workflow is not so smooth as for Flex apps.