Yeah, to be fair, having her is just the Deluxe EX++ treatment, using her from your friend list still makes her a meta-defining Servant (pushing Arts looping to the top until certain NFF Services fox girl brings Buster memes back).
Also, I got Qin Liangyu and I absolutely love her. Gotta say, she's not top tier by any means, but it is super fun to play around by spamming her NP and focusing her with a taunt for maximum debuff memes.