Honestly, the organde-whitr theme hurt my eyes a lot when reading it at night with my phone. It isn't structured as good as smf. I basically scroll over a thread and lose my coordination over the thread, because of the "all organge-white-black" theme. I can't see a difference between continuous posts, because there is only a very thin grey line between each post, and no shading at all.
I hope there will be improvements on this (classic theme, night mode etc)

Also, it doesn't seem to have any signature, avatar restrictions.