More than a single VM per App

I want to model a virtual router in CloudShell in a standard fashion.

My router has several line cards (VMs) and each line card as several ports (vNICs).

I want my Blueprint to have more than a single vRouter, and I want the Sandbox automation to handle the L2 connectivity between them, however, today an App represents a single VM, which is limiting, because I don't want to see so many Apps in the diagram, and I also can't easily associate an APP with a vRouter so user will be able to easily understand which App belongs to which vRouter...

I want each App to represent a vRouter. so in my example, I want to see several Apps connected, with the ability to drill down into each App's details in case I need more information about the underlying infrastructure (the different VMs ant their attributes).

In addition, from a BI standpoint, I want to be able to look at my dashboards (also) in the context of a single vRouter, and not to have to aggregate several APPs to be able to understand the utilization (or other metrics) of that vRouter.

By the way, this is also the case for container technologies, where I want an App to be a container that can scale up/down and contain more than a single instance.

What is the current best practice of modeling such use case given the existing capabilities?