It was deigned to curb backloading, certainly, but could Alina's fans take a leaf out of her book and stop whining that "tain't faaaaiir"? As I understand it, she only did the backloading because of a previous ruling giving a bonus for it that was designed to stop the then problematic frontloading and supposedly to encourage a balanced program. That Eteri found a way to legitimately exploit it is all credit to her, but when she did... it no longer served the purpose for which it was designed. It certainly was never some god-given right engraved in the annals of posterity.
What the ISU (who are currently in my all-level-of-hells-and-I-hope-they-fry-there black book, so I cannot believe I am saying this) giveth, the ISU then tooketh away. No one has banned backloading, they've just stopped rewarding it so much.
Backloading wasn't "discovered" by Eteri (neither it was her who has found "the hole"). Every skater tried to put as many jumps into the second half as possible, first 3-4 and later 2-5 started to be pretty common layout, though only Alina and Aliona were able to fully backload the free program (though before the Zagitova Rule was passed one japanese lady - I forgot who - announced that she will do 0-7 during 2018/19 season as well).
I just loved some FS fans sour grapes comments about "others don't do that because they want a ballanced program, only evil Eteri doesn't care about the beauty of the programs", which was nuts, because most of the rewst would do as well if they could and as I've said, the effort of putting as much as possible jumps into the second half started long before Alina. Eteri's team just got two jumps further