If you made an additional wall for wood, stone & metal that also was a door so smaller dino's could fit through would be a great add-in. Sometimes you are scouting around and need to build quick structure and this would allow you to make a 4 wall structure that looked like a regular wall but could be opened. Also a ceiling gate with options to hinge opposite sides so you could use two of them and create door on roof or maybe allow the dino gates to be angled horizontal and vertical so you could use them as a ceiling for flying creatures.
Slingblade "King of the Mountain"