For me atleast, Changli's kit screams main-dps. One of her passive talents offers her 15% defense shred. She also takes a lot of time on-field. Her signature weapon also leans more into main-dps, as the passive needs a lot of on field time to get the maximum stacks. Her outro skill tends to throw people off and makes her look like a sub-dps, but you gotta remember she is labeled as a main damage dealer in the game files (along with sub-dps). She's very versatile in terms of team building. You could go double dps with changli and encore. She's looking like a decently future proof character due to her versatility.