navindra This extension is not an update of the-turk/flarum-stickiest.
This version was written completely from scratch for Flarum 2.x and it does not reuse or depend on any parts of the 1.x branch. You should treat it as a brand-new extension. Still, to help people who are migrating, I made existing super-sticky and tag-sticky discussions compatible with this extension.
For example, the 1.x version could not work without flarum/sticky. My extension, however, works even without flarum/sticky, while still respecting its settings and handling its functionality when present.
So yes — the 1.x flarum-stickiest and the new 2.x stickiest should be considered different extensions.
Anyway, after this small clarification, I’ve added a plan to introduce an admin setting to disable the styling changes for those who prefer the original look. Happy to hear you’re enjoying the extension!