I'm surprised there's so much fuss over a mere 1% crit.
Yes, it obviously makes a difference, an incredibly small difference at that.
If you're doing an end game dungeon, and you fail to down the boss because all your DPSers do not have that 1% crit bonus, either the content or player skill is at fault, not the race of the DPSers.
Choose whatever class you like, if Castanic happens to please you, go for it.
It's quite clear the devs never intended for a specific race to go with any specific class.