I voted no. It's great outdoors, but it's usually useless in the dungeon (until you hit the requisite "room of brightly colored giant mushrooms"). It's also most effective (and looks most overpowered) at lowest levels. It doesn't take too many levels before foes have good Reflex saves, high Strength, and/or good Escape Artist modifiers. Or maybe they just fly.
Having said that, I wouldn't be opposed to reducing the AoE to 20' radius. That would be comparable to Web, which is the next most similar spell. A reduced AoE would basically guarantee that creatures that save get out in one round.
By the way, if there are no trees to hide behind, affected creatures could also just go prone to make it harder on the archers.
--Axe
Having said that, I wouldn't be opposed to reducing the AoE to 20' radius. That would be comparable to Web, which is the next most similar spell. A reduced AoE would basically guarantee that creatures that save get out in one round.
By the way, if there are no trees to hide behind, affected creatures could also just go prone to make it harder on the archers.
--Axe