So, you want sprites to be like small pics and small pics to be like sprites...
When I place a Text Statement event and choose sprite, I have all of the animation options that I do for a small pic. And Paul fixed the animation for sprites a while back...
I'll grant that you still only have the 3 positions for choosing from in the event, but that doesn't mean that you can't have more than 3 frames that can be accessed by that particular drop-down menu.