Mostly I just disappointed that all the species are going to look so boringly like H. sapiens, but that's sticking to realism for you.
All of genus Homo seem to be pretty, well, human-like. There's alot of debate about this stuff of course, but evidence keeps piling up all the time that "our close relatives were more like us than we thought". And as genetic studies improve and we sample more people, we are finding more and more DNA of our close relatives alive and well in people today. From a certain perspective, the different members of genus Homo are more like different races of one species, and in recent history a really successful race - the people who came out of Africa 70,000 years ago - swamped out most of the other races, so now we pretty much all look like them, even though we may have traces of H. erectus and H. sapiens neaderthalensis DNA.
Long story short, safest bet when portraying other hominids is to make them more human like than non-human like.
fasquardon