As for the photo, you can set your image border radius to 0 in appearance to change this! But it's nowhere near as easy to use as I'd like (added days ago), so it's easy to see why this can be overlooked. We're adding presets soon too (small bits of css that can be layered on top of themes, ex: square or circle avatar photo), so maybe we can make these easily selectable from the settings panel? I'll have to reconsider this.
Thanks again for the awesome feedback, it really helps.