Deku's new quirk in the manga is really exciting. It's a complex and multi-faceted ability that requires him to master new techniques and strategies. Fans are loving the fresh take it brings to the story.
Shigaraki is not dead in the manga. The storyline has many twists and turns, and his character plays a significant role, so his survival adds to the ongoing drama and suspense.
The new quirk of Deku is quite exciting and adds a new dimension to his powers. But I don't want to spoil it for you. You should read the manga to find out!
One possible fanfiction could be that Deku discovers his new Black Whip quirk during a particularly intense battle. He's facing off against a powerful villain and in a moment of extreme stress, the quirk just emerges. It starts as a small tendril and then grows rapidly, helping him to bind the villain and turn the tide of the fight.
One great plot twist could be that Shigaraki has a hidden noble intention behind his actions. Maybe he's trying to expose a deeper corruption in the hero society that no one else sees. It makes readers re - evaluate his character.
In certain fanfictions, Shigaraki's redemption is tied to his past. Maybe he discovers some long - forgotten memories that make him understand his true self and that he doesn't have to be a villain. He then starts to use his power for good instead of destruction.