Like everyone, I'm struggling to make sense of these changes. My family has a 360, a DM, PM and GM in it and none of the four of us has found a way that these changes benefit us. I'll fully admit that I am likely the unprofitable class of passenger Delta is trying to get rid of. I've been off the road for a few years now. I went from 100+ segments, mostly international, a year to a dozen or so flights a year. However, I was loyal to DL and its partners because I could get club access either through status on international or through my Amex Platinum domestically.
Then DL got rid of most of its Asia routes, and I became a free agent when doing a few dozen TPAC and intra-Asia trips per year. Usually China Eastern (DL Partner) or Thai Airways. Once all that stopped and I was entirely domestic, I stuck with DL because it was an easy path to status and club access with my Amex Platinum. Now, what is the point? Sure, Delta is still the best at handling IROPS if you're medallion, but some of us won't be after this. Even then I'd have stuck it out if they hadn't also killed Platinum's SkyClub access. Six visits per year? I've done six visits in less than a week multiple times this very year. Maybe that makes me unprofitable, but surely that is still more profitable than me spending my million+ MR points on Amex, closing the accounts and shifting all of my spend to other airlines. The 360 member in my family is even more angry than I am.
These changes are so extreme and so outlandish that I can only assume they were done so that Delta could subsequently walk back half of them and claim they're listening to their customers.