I have to agree with you, it needs rudders and stabilizer surfaces but it is very possible that this craft may have multiple thrust vectoring points which could allow for the elimination of SOME of those flight control surfaces, that would add to its stealth capabilities.  I would like to see more of the aircraft, but from the picture it does appear that some of the exhaust porting is above the stabilizer area instead of further back like previous conventional designs.  That would certainly conceal much of the heat signature of the craft.