I'm in the same boat, they have subbed in a 787 for 2 months with the change of departure time, then it goes back to the way it was before
But, this was when I saw it and checked on Tuesday some upcoming flights I have, they might not have loaded the rest yet
I'm not happy about the downgrade 787 either from a a350, but that is the way it goes
It does mean I will have shorter in the Al Safwa lounge, but I'm not getting up for the early flight just to have a little lounge time
When I did see the change I was hoping that it was a change to the A350-1000 from the non qsuite a350-900 currently being used