What features would you expect from a real-time strategy card game like Ergenekun?

I'm building Ergenekun as a browser-based real-time strategy card game inspired by Turkic mythology.
The core mechanics and the first playable version are live, but I want to shape the next steps together with the community.

Which features, modes, or mechanics would make a real-time card battle game more fun, strategic, or replayable for you?
Any ideas, suggestions, or insights are genuinely appreciated.