It should have more interfaces. In terms of interfaces or protocols, what you can do with Rational is far limited as compared to other products out there. What it does, it does great, but it only gives you limited types of protocols. It supports between 8 to 15 types of protocols, whereas other test tools give you 20 to 30 types of protocols with which you can do testing and convert to script.

It records Javascript-based scripts, and you got to know a little bit of Java to basically be able to edit them, but the level of editing you got to do is very low. I like that, but the ability to edit the script is not as good as Parasoft or LoadRunner, which have C-Script.

As per my working experience over the last three and half years with RIT/RTVS, I would consider two following areas of improvement:

1. Reporting, in the recent release of RCPT, "Usage graph" feature is included, but that still needs improvements in terms of UI and timeline, filtering criteria.
2. Implementing custom functions is bit tedious job ,as ECMA script does not support some of the standard java-script functions, Also the Script editor window is not user friendly .

There are a number of things that they can do to simplify the tools, but the most important thing that they need to do is simplify the installation. This includes the workbench as well as the other tools.

In the future, I would like to see the other types of tests supported, that are not already covered in the DevOps approach. This would include, for example, penetration testing.

For better understanding of the GUI design perspective, Rational Test Workbench has the concatenation issues which cause the incorrect grammar in different languages. This should be improved in the future releases.