Is the reason for this paragraph that, even though they would have over 200 instructional hours, some CPL Instructors might still be Restricted?
No. This came in with JAR-FCL where a FI (Restricted) could give instruction on an Integrated Course at PPL level. ( there is no indication anywhere of which parts of a CPL course might be considered to be at PPL level) No requirement for 200 hours, because they are not teaching CPL. In the 20 years this has been in place, I have never encountered a FI(R) teaching in an Integrated school.