It is not necessary to have full DOX, or even the name of a developer. As a matter of fact, it may even cause a felt sense of security. It is important, however, to be familiar with the developer. If the developer is a BTC forum member with a good reputation, it is a big plus. However, if the developer is a newbie, that should raise a red flag.  Please note that a red flag does not necessarily mean a scam or a bad coin. It just means that it is something to take note of.