I couldn't find one...
I'm really enjoying Construct 2, but there are a couple of features I really wish it offered, features I am used to with other game engines I've used in the past.
DEFINE PATH (AND FOLLOW PATH)
I'd like to be able to define a movement path for a sprite and then have it follow the path. This would be incredibly useful for Tower Defense titles, Zuma-style games, and more. I use paths a lot when I'm rapid prototyping ideas for work. For example, to show an object float out of chest and do a little loop before flying off screen.
MOVE TO BEHAVIOR
I know it's relatively simple to do this using math, but it would be so much quicker if it was an included feature. (And not a plugin, which I try to avoid due to compatibility/bug concerns.) Just the basic feature would be sufficient, though it would be even better with easing and Bézier curves.