Initially, I had the same concern about the jumpy EVF, but I really hated the size of XPRO1. So I got the XE1. After shooting for a while, the jumpiness did not bother me anymore. In fact, I like to see all the details of my settings. Before I focus, the EVF shows me the histogram letting me to decide if and by how much I should adjust the EV compensation, and I can actually see the results of it. I cannot do it in OVF. This has changed my attitude towards EVF, and I think it is a great feature that I will not want to give up.