The only people who might be able to offer reliable feedback about what the USPTO is/is not likely to do are patent or trademark attorneys who have experience filing Trademark Registration Applications. Although the people who post to this forum have a wealth of knowledge on domain names and other topics, you are doing yourself a disservice if you ask for non-legal opinions on this particular subject (trademark registration).
I see you say you have heard from several attorneys. I would suggest you go with one of their opinions (keeping in mind of course that they are also unable to predict what the USPTO will do with absolute certainty).
Good luck with your decision.