It would be great if you could have an easy way to take packet captures on specific nodes from VoltConsole, perhaps under VoltConsole -> Sites -> Connectivity -> Tools.
It would also be useful if you could specify the interface(s) and optional filters (e.g. protocol, port, etc).
A feature that is available on F5 BIG-IP (and I believe NetScaler too) is the ability to decode SSL/TLS traffic and this would be a "nice to have feature" for the ADC use cases.