I disagree that Disney is making resale people wait for their membership number solely to encourage people to buy resale. If this was true, they would make it part of the direct sales spiel tactic. "Don't buy resale. Not only will you have to wait 30 days for ROFR, but after your sale, we have a policy of just letting the new resale owner's information sit on our desk for a determined amount of time just to annoy them and make them rue the day they didn't pay thousands of dollars more!"
The simple truth is that the administration of resale purchase paperwork is, of course, NOT a priority. I've heard that have one staff member working on these, with who-knows-what other responsibilities. So I believe: Low priority? Yes. Deliberate delay as"punishment"? No.
Like a PP, I called the member accounting department a week after closing, and a very nice person gave me the information.