A few new features that will be coming to the Concentratord (when used together with the ChirpStack Gateway Bridge):
Channel-plan reconfiguration
This makes it possible to re-configure the Concenatratord channel-plan over MQTT at any time. I’m planning to use this together with the Gateway Profile (with documentation which hopefully better explains what the Gateway Profile does). See also: Who is using the Gateway Profile / how are you using it?.
Metadata
In https://github.com/brocaar/chirpstack-concentratord/commit/6c7ce84a14c6df4e22b257f8bbd51cc6a68ccc1f I I implemented forwarding gateway metadata (like model, HAL version, …). This information will be visible under the gateway metadata in the web interface:
Support for different gateways
I have started to add calibration values for various vendors / gateway models. I have also started adding packaging scripts for creating gateway specific .ipk packages. Please refer to https://github.com/brocaar/chirpstack-concentratord for more information.
If one would like to get involved, adding new calibration values for gateways would be easy task 
Also providing feedback would be really helpful!
@jfmb yes, that is (currently) correct. However, with the Concentratord it is possible to run multiple forwarders simultaneously. One would need to implement it, but there could be additional forwarders running to forward data as UDP.