I don’t have a MD anymore, but I used to use classic mode a lot, it is a great to save your kit in classic mode with a fairly standard pattern, then switch to extended and put in all your p-locks, try things like lowering volume on certain steps, swelling up delay, filtering etc, then switch in and out of classic mode for some nice variations.

Basically classic mode ignores p-locks, but you can kind of use it like a scene if you use it the other way around as described above. Try it.