From what I saw Cosmic has a lot of potential and looks pretty sleek too, right now I'm using KDE it's a great desktop, but now that I have a second monitor it randomly crashes on me, I think I'll switch to Cosmic when it reaches beta.
I'm not really invested in Cosmic, I'm happy with Hyprland and will continue to use it.
I do think they did a REALLY nice job with the tiling. I don't think you can find a more intuitive and user friendly tiling window manager. Something that's not absolute barebones out of box and can be configured entirely with a GUI. In that regard it does bring something to the mix and is very very welcome.