Poor communication. Only one point of contact for administrative/technical issues and that person is unresponsive most of the time, to IM and to Email. Some of the contacts that distribute the work and proofread need to learn a little tact. I've been around long enough and I'm thick-skinned enough that I don't take it personally, but I know of many others who are intimidated by the snarly replies they get when they ask for files.
Pay is the lowest I've seen for online work. To the other poster, if you think this is high pay then it must be the first paid job you've ever had, because it only pays a fraction of what other companies pay.