The MVA group in Norcross, GA, claims the magnetite is a high-temperature variety. PAHs not present in living matter, but present in decay products. But PAHs in ALH84001 do not mean there was life present, because PAHs appear in many places, including interstellar space and interplanetary dust particles. It's the localization of PAHs within the carbonate globules that might suggest a biological origin. All of the arguments for evidence of life simply point out possibilities.
Extraordinary claims require extraordinary evidence.