I felt the same way about the projectiles at first… I felt the Mage class was kind of useless, but after sometime, I think it is awesome. In 6v6 you need at least one mage. IMHO, Archers kind of make Chivalry not so fun. I like the slower projectiles, and more up close combat of Mirage.
I think the pace of the game is fine, because every class has some sort of dash ability, it works out.