The new Hold Person is probably more dangerous than the old Hold Person even if it is weaker, but the one that slipped through the net is Color Spray.
Hold Person was nerfed, Sleep was nerfed (reduced HD affected, increased casting time), but Color Spray was left as is...
...when in fact it is patently more powerful. At low-levels, it is more powerful than Sleep...affecting an average of 3.5 creatures of 2HD, it affects 7HD- significanty more than Sleep. It lasts longer (2d4 rounds) for the unconsciousness, which is better than Sleep. It cannot be broken, unlike Sleep. It is significantly better at high levels compared to Sleep (i.e. it has still *some* use).