Take a look at the evidence in the real world (y'know, actual facts, not baseless speculation) and you will find strong indication that larger board sizes increase corporate performance.
> Boards beholden to current workers may sacrifice a lot of progress to keep things comfy, at the expense of future workers and jobs.
Again, this is the sort of thing that you could investigate by doing research of actual facts in the real world. You might start by looking at how German firms with significant worker board representation responded to reunification and Eastern Europe online. Hint: workers did not sacrifice future growth to keep their "comfy" wages.
> Obviously it "works" in germany, for some amount of "works," but it should need no explanation that US companies as a whole are able to move faster, and in high tech, often with higher wages(!!) than in Germany.
Like most "economic debates" in the US, I expect the debate around codetermination will be driven purely by ideology. There will be no serious review of the existing economic research and zero attempt to seriously investigate what works and doesn't work in any countries. What you'll get is just one side crying "Communist!" and the other side crying "Capitalist!" and there will be zero progress.