copy to TestRequest improvement

Hello,
I have a situation where I have would put a certain assertion in all occurrences of a method.

currently I use 'copy to testrequest' in the interface menu when a certain request has changed, this way I can copy the modified request to all testcases.

if I can somehow create assertions at the interface level and 'copy to test request' also copies/overwrites these assertions to the respective testcases, that would be great.

Thanks

Ali