I'm with Odii on this one, though he could have worded it a little better.
His point seems to be: in a vacuum psion could be fine, but considering the easy synergies (fractal, dim shield, lobo, all in element), and the comparison with (unupped) phase spider, it needs a small nerf.
For that reason, I fully support a hp reduction: currently psiontal is neigh unstoppable, especially if you bring lobo in case of reflecting shields. With less hp's (mass)-CC would be much more effective. Aside from that, I think phase spider and phase recluse could use a hp increase as well, that way, people have a bit more incentive to use spider of psion. (I would say 4|4 unupped spider, 7|3 or 6|5 upped)