In the article he mentions "the game has changed" with new quests and a synergy system but these weren't added to resurrected.
The extra act came with the D2:LoD expansion in 2001 and skill synergies became a thing in the 1.10 patch in 2003.
That said, they have started to make actual gameplay changes since then. Last month gave us the first gameplay patch to Diablo 2 since 2010: https://news.blizzard.com/en-us/diablo2/23788293/diablo-ii-r...
I’d personally prefer if the gaming community wasn’t so monoculturally driven to a prescribed set of game attributes (e.g. end game content, DLC, battle royale, loot boxes, skins, sandbox, open world). D2 isn’t for everyone nor should it be :)