I'm a recent convert to Shapes. My entire game is made with it! It fills a missing gap that Unity has had forever.
I'm an ex-Flash developer, and when I moved to Unity I couldn't believe how primative the tool was in comparason. I was like "so how do you actually draw something? And where's the timeline? And why can't you do nested prefabs?". They've only just fixed the nested prefabs thing in the last year or so! The other two... Still waiting.