We, as a company already know how much our competitors pay for a given role as everyone in the industry is buying and selling statistical data on their compensation structure through 3rd party agencies. Therefore, we can and do intentionally target, which salary band our positions should fall to in the broader market.
You have absolutely no way to negotiate your base salary above the band which was already known when we created the position. There could still be substantial differences, as even mid level roles have 30%+ difference in band limits. You can however, have the position to be upgraded or downgraded if certain circumstances met, but that's a new position with new salary ranges.
These regulations likely increase employee leverage, but to which extent, hard to tell. You should care about your total compensation anyway and neither cash bonus, nor equity is covered in the disclosure, although especially for senior positions, those are very substantial part of your compensation.