Here's what I know about MP and Madison.
My SA specifically told me 2 weeks ago, and then reiterated in person on Saturday that there should be no bag sales ( except for the large men's travel ones or the totes) through the rest of the year. I confirmed this with an SA and a manager when I was at Madison this weekend to pick up a jacket that was tailored). The stock is diminished, and they are not expecting any more. This does NOT apply to any other department ( shoes, RTW, jewelry etc.) Multiple reasons, some obvious and some mere conjecture, so although interesting to speculate, that won't get anyone anywhere.
Now is that written in stone? Is it always possible that in December ( magically) the "ban" will be lifted for the holidays? Or earlier? No one who is talking has any idea. SAs aren't happy and apparently, some clients aren't either. Doesn't matter-that's the reality as it stands now. And the "ban" only applies to bags, nothing else.
And honestly, that should be fine from a client/customer POV. If you love the brand, value the craftmanship and appreciate the time and effort that went into creating that bag, whether you acquire it NOW or in 3-6 months ultimately does not matter ( although of course , it would be NICE to have it now

). You will love it when it does appear. And no, I have not already bought 2 "quota" bags this year, nor have I been offered an SO ( and I won't be, as per my SA). So that's NOT the place this is coming from.
It's much worse from the SAs POV- just consider the added stress and anxiety of continually having to say "no", having people think you are lying to them, and many of those people being impressively rude, all the time worrying about your holiday season's commissions dwindling while being cheerful and charming.
So (and please forgive me, I do NOT mean to offend anyone, and apologize in advance if I do) just take a deep breath, and take things as they come. It will be fine.