This was part of the initial design, but adding an extra window to pick the rules from is significant extra effort - we'll put it as nice-to-have requirement, but at this point the workaround will be to copy all rules, and delete the unneeded ones. This is quite tedious as you have to delete them one by one... maybe we could see if we can enable multi-select when removing rules to make this faster.
Regarding the new feature an additional action could be useful:
- "Copy Rules From": which would list all rules from a chosen request types, and copy only selected rules into the current Request type
Sometime there are requests with hundreds rules: copying all rules can be tedious in case only 1 or 2 rules are needed into the other Request type. A form like Request type field "Copy From" could help.