Just a data point from today 01/06/2017.
I called Marriott to order a Hotel plus Air package with Southwest as the designated transfer airline.
I asked the rep for the 5-night package. She said we no longer offer those. I said I had seen it online, etc. etc. No luck.
Being that so many had reported no success in the 5 night package, I decided to just take the 7 night package without HUCA.
As she was getting my information I mentioned that I really was disappointed that I couldn't get the 5 night package because it's so hard to find 7 consecutive days of availability....
Anyway she put me on hold to do the transfer and she came back and said you're all good to go, you should see the SW points within 3 business days.
Then, I log into my account and see that instead of deducting 270k, she deducted 235k and there is a 5-NIGHT TRAVEL CERTIFICATE! (see image)
Don't know how I got so lucky, but it looks like the reps can easily do it. (No I don't own a Marriott timeshare, I'm just Gold status from cc).
Now, I just hope nothing changes and the 120k transfers smoothly to SW.