At the moment, Temples produce Archons, Daemons, Nagas and Elementals. Out of those, 3 belong to a specific race. Imo, Archons, Daemons and Nagas should be specific to their races to help increase racial uniqueness.
I think one of the temples should give access to the race's general(s) (the one with the same alignment?), one should give some other bonus like access to cheap/fast producing units or research (opposite alignment?) and the Snake Temple should go back into being the Dragon Temple again, which is capable of building the race's 2 Dragon units.