I've been thinking for a while about new models but unfortunately I'm quite dumb when it comes to modeling (I'm more of a scripter). So I got this idea that I'll throw my ideas here, maybe someone will pick them up and share them with this wonderful community
1. Spike trap (animated) - self-explanatory, could have class = "pressureplate" - it can be remotely (de-)activated with activateAnim that raises the spikes from the ground.
2. Crushing trap (Indiana Jones style) that damages you from above (more-less like a cube), this could be created with a class = "Door", smaller cube that hangs under the celling while opened and looks like a pillar when "closed" - combine with damage tile and we'll have a new class of trap
3. Moving wall - I think this could even be done without modeling (maybe just a model with a wall with spikes or something like that). This could work like a spell that is spawned by a spawner and moves (and pushes/damages the party - via lua script).
4. Door that can be chopped with an axe (just a model of destroyed wooden door that will replace closed door when hit a few times)
5. Saloon-style door
6. New kind of switch: like a ship's steering wheel
7. ...