When making room requests, try to be as clear about what you want as you can. Be prepared that it may not be possible for the room assigner to give you the room that you are hoping for.
In the case you described above, I would request close to club lounge rather than close to stairs. (There may be multiple stairways and the room assigner looking to fill your requests may not understand that your purpose is to have easier access to the lounge.)
I would also place requests in order of importance. For example, if proximity to the lounge is more important than a large balcony, then I would request a room close to the lounge with as large a balcony as possible. If the balcony size is a deal breaker then I would request a large balcony, as close to the club lounge as possible. If you have any other requests, then I would list that next.
I typically keep my requests to 3 or less and try to give the room assigner the most options to give me a room that will meet my needs.
Congratulations on your upcoming stay at the Boardwalk Club level. It is a wonderful resort!
BTW, check out the club level information thread here in the resorts forum. The people there have lots of information to share and love to chat.