I created the acidborn shark, and I was making fun of myself.
I've never read any reviews about Dungeonscape, but I would point out that the acidborn shark was intended to be ridiculous and over-the-top, because sometimes that's fun. It's specifically stated that it was only bred to be used in dungeon deathtraps. The reviewer quoted clearly wants his D&D to be Serious Business, but screw that. If I thought I could have slipped laser-headed sharks through the WOTC editing staff, I would have.
The factotum was all Jason, though, as was the dungeoncrasher.