Katalon Studio should improve its usability, it still needs some improvement where users can easily use it to build their automation suite. It requires some initial work to set it up. There should be more keywords in the library to limit the coding requirements, this will allow a non-technical person easily start using it, which would be better.
The tool's maintenance is very difficult since they do not follow call by value or call by reference. Due to this, any change happening is not reflected throughout all the test cases. There are some issues with data parameterization as well.