It’s not impossible for Hemsworth to do well. But he has a big shoe to fill in terms of audience expectations. It would also be difficult to maintain the integrity of the show with such a major change in casting.
Hopefully Hemsworth will fight for Geralt to have a character as well. Or will he just be a strong, silent and boring womanizer? Perhaps Cavill was right to abandon the ship and focus on his role as Superman. You can’t achieve public justice when you don’t show respect to the source material.