When pasting copied sketches with user parameter driven dimensions we spend a lot of time re-assigning the user parameters to the pasted dimensions.
Seems to me that IV could check if the dims it's pasting include user parameters and if they do, offer to use those rather than creating new user parameters.
(Or it could be achieved via a 2nd Paste with Fx option in the context menu.)
If during pasting, the user parameter does not exist, IV could create a user parameter as is does now.
Cheers
JF