If this is already in construct then I missed it and I am sorry. But it would be great to have a little checkbox for "Lock sprite size" and "Lock sprite angle" so you do not accidently resize/reangle a sprite.. I know this is not a big deal since you can simply ctrl z undo the action but just a thought.
I know that construct has a no rotation option but thats for when construct rotates the object and not the user.