No. I am (extremely) well-versed in CAT systems and your assessment would be incorrect. A person who continues to receive questions is NOT "below the passing level"; more questions are asked because the candidate has been inconsistent regarding correctly answering questions above the passing level. IOW, someone who is close to the passing line (which can very well be above it as well as below it) but has not demonstrated to a 95% CERTAINTY that they are competent will continue to get questions until that confidence level is met. It does not mean they are consistently below passing; in fact, if they WERE consistently below passing....the exam would end, and they would fail.
Getting more questions doesn't mean you have a greater likelihood of failing; the statistics don't bear that out as truth. Every candidate gets approximately 50% of their answers wrong, whether they answered 80 or 180 questions. It's the level of difficulty of the question that determines whether getting any question wrong matters....at the passing level, you ARE expected to get about half of them wrong. CAT continues to adjust questions based on previous questions.
People will always have anxiety when their tests go higher and higher in number, that's human nature: everyone wants to be done, NOW! But if they keep a level head about themselves, it doesn't matter. People freak out far too often, and that's on THEM....not the test.
As for all the rest about "the test changing next year"....EVERY year people speculate, listen to rumors and gossip, and have yet to be proven right by any of it. Internet is full of nonsense about NCLEX that can be put to rest if people would only go to NCSBN.org to read for themselves what the facts are. It's actually a pretty good read, if you're interested.
I do not believe this test assessed my knowledge and I do believe there is a better way to assess a nurses competency. I hear their changing the exam to have a skills portion next year. I do understand what your saying about scaring people about the higher amount of questions. When my exam went past the minimum I did have to take a few deep breaths lol.