Last part :
8 -> the definition of P2P is to not have a central autority. They can have a central helper, but that's not mandatory, and if it's down, the network will still continue to work.
For the ones having none, you state that you can attack the network as whole. That's a very big oversimplification, and this can also being stated about Simplex in this case, because you don't define limits.
Also, in a P2P network, you don't need all the nodes for having it working, you only need 2 interconnected nodes as said previously.
Actually, from your whole comparaison, I'm getting that your app works as a P2P network, built with a custom protocol made for IM.
This by itself would make your app interesting, but this flawed comparaison raises multiple questions.
Also, usually, teams selling their products by comparing them in a missleading maner to their concurrent aren't as good as the teams claim.