New key editor and zoom animation

I'm finding some difficulties in animating the zoom channels in the new keyframe editor, especially when i want to keep the X and Y axis linked and want to work with ease in/out handles. It looks like it's impossible to have both X and Y curves showing at the same time and being able to edit both simultaneously. Too bad setting the X/Y link option doesn't guarantee that working on a single axis zoom animation will reflect to the other axis.
Am i missing something?