Hi joe_midi, yes, hand-coding seems to be the best way to move foreword from here on.
But I've also spend some time with Adobe Edge, which allows you to create the banner on the stage (drag&drop, import assets, moving elements around the stage, typing text, adjusting all the layouts) and also has the option to code all the animation with GSAP. Pretty much the same thing as with Flash.
But I don't really want to use any timeline animation features of Edge. Even though they're quiet impressive; very close to how things are done in After Effects. Instead I would mostly use the timeline to design and organize the banner (intro frame, video frame & end frame). But then the java script code in Edge seems to be slightly different, since I always need to refer to the Edge stage first to find other objects. I can't just copy and paste some js code on different frames and expect it to work.
While this features in Edge are all neat and everything, I'm still discussing if I really need a graphic IDE with a stage instead of just using a code editor and browser. Am I limiting myself, since I have to deal with filters of an interface (instead of seeing the clean code directly) or am I pushing the boundaries since I can work with grouped symbols and don't have to babysit every single piece of code?
GWD seems to be more like Adobe Edge Lite.
I wonder if there are any people out there who want to code all the animations with GSAP but prefer the stage interface of Edge (or GWD)... Especially since all of us used Flash to create banners. So we are all used to that setup (stage interface + code).