All these changes are but a tip of a looming ice berg. If it all seems sudden and scrambled and disorganized, that's because the company itself is reacting to those very qualities of change from the market.
With that said, we can expect to see some really crazy moves in the near future: a veritable implosion on the management/store staffing end.....and ancillary services such as WM transport, DCs and many diverities being either outsourced or elliminated.
Walmart vastly over extended itself 12-15 years ago; they'd gone so far as selling cars, opening fuel centers and even peddling coffins and cremation urns, for God's sake. They tried and failed at entering the banking market, and it's good they didn't, because that failure would have hastened their current troubles by years. ... Else-wise, they were on average building 5 new stores per week. And that's a lot of realty to now have to sell/rent or otherwise legally be responsible for.
Yep, it's gonna get hairy for Wally.