....
1.Viewfinder:
Yes, Ricoh lacks of an optical viewfinder, and no doubts it would be great to have a small one like the old GR film cameras. Btw, as nightfly said, you can add an external viewfinder on the hotshoe and the job is done. So, i don't really understand the complains about the "missing" viewfinder on this camera. Then, as johnwolf said, after using for some time the same camera and focal lenght (28mm here), you don't use the screen to compose: you look at real life, and when you feel something interesting is happening/is gonna happen, you raise your camera already knowing what will you frame. It's like you have 28mm frames in your head! 😉
...