I've noticed that when using some of my old zmud speedwalks that certain areas have either been removed to put somewhere else. Over the past couple of weeks, I've noticed a lot of room descriptions that mention something being to the east, west, north or south but there isn't anything there anymore. I know I've seen about 20 of these room descriptions that point to non-existant directions.
One way to get these issues resolved would be to use the BUG command in each of the room that has the issue as this will automatically associate the bug report with the relevant vnum.
The bug resports can then be passed along to the relevant Builder(s)/Retro Team for action as needed.