TBF I would play that.
I think people cut that expansion off way too early when it came to twinks. It was really undervalued. Yeah it had some one-and-done luck with quest epics and whatnot, but that just added some character flavor really. Made some people stand out, and the difference between that and gear you could farm was so miniscule that it was basically just a small flex if anything.
Every class had either one or more competitively viable specs.
It was the first step into making gearing interesting again.
No mounts below 20.
SL has interesting gearing, but the whole mount thing is what some people will say is what killed 19's, even though most of them had already quit midway into BFA anyways.