It will be great if their may some minor additions
1) In C2 we have option to duplicate sprite by doing right Click but in C3 their no option for doing duplicate Sprite
2) C3 Rotation is good but If we can see hotspot then it will be easy to be notice when we may changed it my by mistake
3) while changing animation frames for (in C2 when we do slider down then it remain on same place and i can change 50 animation frame quickly - example while making levels) But in c3 It always go upside to default position and i have slide it down each time this may consume time. (Inshort- Save Property Bar's Scrolling Position)
4) What about Ribon Bar (My favorite)
5) please add circle collision in image editor.
6) in Image Editor Each time i have to select tools like rectangle, Fill, Circle when I want to change colour of each frame