First off - hat's off to the DEV TEAM this year for some amazing updates. The animate to a path is pure genius.
Here are two features I'd love to see added to the product at a not too distant feature date :)
1.) Guides - having dragging guides within each "page" of a GWD project would be fantastic, including those within groups/divs as containers
2.) Insert/Remove a Frame - much like Flash, it would be wonderful if there was a way I would could right click in my timeline and insert a frame - either extending my animations or contracting my animation tweens/length. Changing the length of tweens presently is time consuming and error prone since you sort of have to do the adjustments in bulk or on each individual layer in the timeline.
Thanks for all that you do on this application - we couldn't do our jobs as fast or as accurately without this excellent tool.