Break points & Intellicence features in Groovy Script Editor

I would let the soapui team take this.

Wanted to add:
I believe, you may take a look at soapui pro where there is feature to have break points in the test cases.

Also, here is how you may debug the groovy scripts - if you are eclipse user, then have a groovy plugin installed and it is possible to debug the groovy code which is alternative way what you are looking for, then have your code from eclipse to soapui groovy script step.