I just tried it. It's just as bad as AWS UI ever has been. It shows lots of fields that it extracted from the log messages. Can you click them to add them to the search box? Nope. Right click for more options? Nope. These are things Splunk has had for years.
Teams are under control of their backlog in a way that let's them prioritise how they approach the UX/UI aspects. For instance, this is why you'll see 2-3 different UIs across AWS journeys, due to teams implementing at different paces and priorities.
