There's nothing wrong with the across the board speed boost, but 30% max speed into the wind is poorly thought out.
From how it reads, if a speed sail has a higher max speed, then it will travel faster than a handling sail directly into the wind. That makes absolutely no sense. What's the point in ever picking a handling sail if it loses its one major advantage?
It also kills the ability of ships to quickly stop by rotating their sails into the wind.
Such changes will diminish a lot of the sailing strategy.
If you still however want to make the change, a better one would be 30% max speed for handling, 20% for weight and 10% for speed sails. That way some diversity and balance is maintained in sail choice.