Long time reader, in Ds5535 hole for just over 12 months now, Canadian , interviewed in Montreal last year.
Incase this helps anyone, I was able to obtain a dual intent L1 visa at the airport in Canada a few weeks ago, now working in the US.
I was only asked about the IR1, told them it's in post interview administrative processing.
Nothing more regarding that was asked, grilled more in job duties, who will report to me etc..all legit questions. It's a large multinational with blanket petition approval.
I spoke to some good WOM lawyers, many who are mentioned here, they all said count your blessings and adjust in the US, moving quickly these days for folks who already have an approved I130.
Even they have no idea what is going on with this whole ds5535 mess, a few mentioned it's nonsense, if there were any security concerns or flags on your file, you would never be allowed in by CBP. They have instant access to all of that.