The merit-based proposal that I've seen last time around had very high bars; much higher than Canada, say. I would dare say that most H1Bs would be worse off under it, in that they wouldn't be able to secure the visa at all.
If they're not, what's the problem? The best performers still got their visas, and USA got the top talent.
Now with the retracted spouse rule you again benefits Asian visas because their spouses usually don't work. In contrary to Europeans.