1. "Take Item" effect. Similar to "Give Item", but it takes it. Could be handy for a trade dialog for example.
2. "Target does NOT have Item" condition. The current "Target has Item" only works to check if they have one, would be nice to have one for the opposite.
3. "Is NOT Character" condition. Again, the opposite of an existing one, "Is Character". Could be nice to restrict certain characters from saying something that they would normally fit the conditions for. *cough*Ray*cough*
4. Triggering and un-triggering a "World State" via dialog. Could be infinitely handy to be able to. I'm aware this system is still being built though, so maybe it was already planned or something. But if not, here it is.
5. Ability to lock a specific line of dialog after the player picks it. You can currently use the "Repetition limit" to do this, but it will lock it if it ever comes up for selection regardless of if the player picked it.