There are two problems. First, the Drath Temple does not link from the early entertainment building, nor does it link to the Healing Pools. Why would the Drath have Healing Pools anyway? I understand that the Temple is not a logical technological progression from the earlier building, but it's a huge pain to go around all your planets and make sure that they upgrade it. It also clutters your build list really badly.
Second, the Biosphere Modulator seems to only give a 10% industry bonus, making it a crappy expensive generator. I never built one, so I don't know if the display is incorrect and it actually does modulate the biosphere.