Maybe?
The idea is the choice, which humans already got, but other races now get. I don't necessarily see humans getting two just because other races get 'choice'. Humans are still ahead in that regard, and two points on a secondary stat is not as important as some make it out to be.
You're assuming that the "choice" stat is a secondary. Who's to say a race's "fixed" +2 isn't a bonus to some class' secondary stat and between the two "choice" stats one of them is the primary of the given/selected class. Non-Human races now have 3 of 6 stats covered for "primary" making additional classes "more optimal" than they previously had. And even if the other +2 isn't in your secondary stat it's not horrible. The new +2 choice for non-Humans makes them that much more appealing and flexible.
I'm not necessarily saying that Humans should get a second +2 choice stat, but maybe a +1 (e.g. point buy a 13/15, bump it to 14/16) to an off stat to help with MAD?