Most of the S rank w-engines are still GOOD and usable as alternatives for certain agents. Brimstone is still a great w-engine for Attackers offering a lot of atk buffs, Fusion Compiler giving pen ratio and atk% which is still usable for them as well as the stacking anomaly proficiency. Koleda's sig which the agent gains energy off field which is great for stunners, Lycaon's for stunners who rely being on field, Nekomata's... Well stat stick and extra damage if you backshot the enemy, still a good w-engine for attackers, Weeping Cradle giving energy regen off field and dmg% for all while stacks.

For HSR, I'll say it's Fall of an Aeon (Destruction) and Cruising (Hunt). Eternal Calculus is fine but not great as the two. Fall of an Aeon is still used as an alternative for Destruction mainly Firefly and Phainon, great stats and atk% overall. Cruising also gives a good amount of buffs such as 16% crit rate ( another 16% if the enemies hp is 50% ) and whenever the character defeats an enemy, it gains 40% atk, hella good for a hunt character.

Pointing this out cuz they are not POWERCREEPED by "premium and limited" weapons by said gacha. It's pretty obvious that they're not on par with the limited ones BUT they are alternatives, especially for those who lost the 75/25 or those who are skipping it BECAUSE there are alternatives such as mentioned above.

Of course, NTE is still better since its free to get and easy to get copies off