If I understand, you are referring to a script that receives a call after first being processed by another script, a secondary "application" if you will. In that case, no, it is not new to 5.0.
The first script that the Master Script passes a call to is an application. If that script in turn passes the call to a secondary script, the stats are still pegged to the primary script. The only way a secondary script can qualify as an "application" is if the Master Script has a direct pass-off to it for some calls. In that case, it will show as an "application" for those calls only. Calls passing from the Master Script to another script and then to that "secondary" application will not count against that script.