Thanks for the kind words and feedback!
Yeah, the photo tracing experience is the most contentious part of the app. Lots of similar feedback from lots of people. I will be improving that in the coming updates. The zoom/pan is definitely tricky b/c it conflicts with the drawing gesture, so panning isn't the easiest thing to accomplish. Again, planning to rethink how to make that better.
You should be able to long-press a sticker in the main view and get the same options menu for copying/etc.... does that work for you?
I'm also planning on supporting other messaging services like WhatsApp, Signal, Telegraph, etc...