I got a mailing from Borgata with my "new" MLIFE card--the account number is my Vegas MLIFE acct number (but this card has a white tag attached).
At
www.theborgata.com (which is now working), it has me as PLAT until 9/2018.
In the Borgata mailing they are crediting me for play since 10/1/16 with 218,000 Tier Points, hence PLAT.
At
www.mlife.com a week ago I had 190,000; now after merger 303,000--so if this includes Borgata, those TPs must count less than Vegas(?)
I had a room booked at Borgata through my slot host, that res. is GONE

, so I rebooked it on their web-site--lots of people are going to show up at Borgata and be turned away, since their previous reservations are GONE

Yeah it seems like a mess. I had a booking which no longer showed on Borgata.com but when I called it was still there, so I think there may just be some kinks in the website. May be worth checking that you're not now double-booked.
And to add to the complications I mentioned in my post, Borgata.com still shows me as Mlife Platinum, but Mlife.com shows me as Sapphire. I think if anything I earned Pearl or maybe Gold (if some credit is provided for historical Borgata play) last year. I just requested a Hyatt match to Gold to be done with it but it's clear there are quite a few kinks still to be worked out. This weekend will probably be rather chaotic at the Borgata.