As of SAP PI 7.3 there is a new Web based tool for accessing parts of ESR called WEB UI. This tool is not intended to be a tool used by any developer but rather by an architect who is just responsible for checking some of the Service Interfaces.
Basically it give you 3 options only:
a) Searching for Service Interfaces, Data types, etc.
b) Subscribing to changes
c) Managing some parameters
As mentioned before you can do a search for some objects like Service Interfaces for example
Once you open the object you an architect can check the WSDL (or the Service Interface) or XSD of the Data Type. This kind of check does not need to be performed using SAP tools as those can be check or testing using many other third party tools. One of the nice features is that the architect can actually subscribe for change notifications for a particular object.
This way whenever someone will change the object he will get notified.
An architect can also maintain the lifecycle status of the object (for example decide if the Service Interface is ready and finished and approve it)
Once the architect changes the status also the developer will see the same status in the ESR.
The screenshots were taken from SAP PI 7.3 SP0 release so it might be a subject to change – Please keep that in mind.