FiftyThree has been finding their way with the Paper app, one I took to early on and have continued to use. My primary attraction to it was that it made drawing simple for those of us who aren’t coming from or trying to achieve a Photoshop or similar level of precision. I can get my concept down quickly and easily and not have to fight the interface.
I’m glad they’re continuing to keep the product evolving, and look forward to the return of the “arrow” lines.