Scene is alright for the time I put (imho, more or less). Doesn't look like it, but lightning is 100% awful tho. Terribad pixel convergence so brute-forced result, crappy noise in sensible area, un-milkable skin detail, barely workable postwork render. Sometime you must admit you were wrong and should redo that \o/
Well, I thought that was the result you were going for. High key and washed out. If you wanted a realistic render then yes, it needs more work. Then again, keep in mind the scene. As a viewer, I assume I'm at 2-3 meters away from her. Now I know that my eyesight isn't 20/20, hell it isn't even 12/12 but at that distance, I don't expect to see any high frequency detail on the skin. I know it's a rabbit hole, and hell..check half my posts here and you'll easily notice I'm guilty as charged, but at that distance, if I saw any skin pores or vellus hair, it'd definitely be physically inaccurate. Especially considering the /very/ strong light washing over her.
As for the noise..Either run a denoiser on the saved render, or just learn to live with it. Leaving most of my renders to converge 100% and over 5000 samples, even in flat lighting conditions I still get tons of noise.