On my current project, I had an issue with my register definitions. Quite a few of my DUT's registers where just instances of the same register type. My vr_ad register definitions were generated by a script, based on the specification, a flow that I'm pretty sure is very similar to what most of you also have. Instead of generating a nice regular structure, this script created a separate type for each register instance. What resulted was a flattened structure where I'd, for example, get one instance each of registers SOME_REG0, SOME_REG1, SOME_REG2, instead of three instances of SOME_REG. I was lucky enough to be able to (partly) change the definitions by patching them by hand.
This is a companion discussion topic for the original entry at https://verificationgentleman.netlify.app/2014/11/17/experimental-cures-for-flattened-reg-defs.html