Emirates is making some changes to checked luggage allowances on discounted economy fares for tickets issued on or after February 4, 2019.
Emirates is introducing new 15 kilo allowance for economy specials that previously had 20 kilos. Some other travelers lose the second bag.
You can access Emirates page for luggage allowance here.
Here are the allowances:
Conclusion
Emirates here is fishing for some extra revenue in excess baggage charges. 15 kilos is basically the weight of my carry-on or computer bag.
I guess that it will be some time before Emirates introduces “basic” economy fares that don’t allow any checked luggage at all.