Nemedian Rooftop Cap: You are unable to place bombs on it compared to other DLC/Base game items.
Nemedian Gateframe: As shown in the example screenshot, if you were to cover a base location that you can enter top down, you can block it off completely with gate frames. If you have for example: Black ice gate frames there is a gap between them allowing players to jump down and also place bombs down into the base. When you have a Nemedian gateframe, it has extra baggage negating it.
When it comes to base defending, repairing is one of the strongest defense mechanics in the game, especially when it involves high HP pieces like drawbridges and gate frames.
In order to get through you would have to 1 shot it with bombs so the enemy could not instantly repair it to full. Sometimes you don’t even have space to place enough bombs to 1 shot it, making it impossible to raid against a defender who knows what he is doing.
How to defend: Place a trap or a bomb inside, explode it and spam repair.
Essentially you are pre-emptively igniting the enemies bombs on the other side of your structures so they are unable to 1 shot it, then instantly repairing it back to full which doesn’t cost much resources.
I’m hoping there’s a bonus round prize. 
