Megamenu’s use for in-page navigation is just so nice and powerful, but I’m always disappointed at its jarring instant zoom to the target. Would you consider giving it a more gentle movement (ala Scroll To and Scroll To Top)?
If I could push the envelope a little further, a pixel offset field for the anchor stack would be incredibly welcomed also. With sticky navigators the target is often hidden underneath the navigator.
As @habitualshaker points out, all of the features you’re requesting are currently a part of the stack. Watch Tutorial 2 under the Mega Menu stack heading on the Potion Pack page.