Even with the stock larger battery the Lucid2 is thinner than many. It just fits into jeans watch pockets.
The stock camera app is missing light meter control, i.e. average, center-weighted, spot. So far one downloaded camera app with meter control does not seem to change anything. I tried about a half dozen apps that turned out not to have a meter control mode, and found this one on this forum after posting a request. But since the meter mode doesn't work, I'm using mainly the stock camera app.
Also the pictures lose their sharpness when snapped and saved. The picture is worse than the viewfinder display when taken. This is very disappointing. My installed downloaded camera app does save a picture a little bit closer to the viewfinder image. The downloaded app mentioned here is Camera FV-5. Overall, it is my favorite downloaded one.