Crossbows already start with a good bonus to stagger, and when combined with power shot.. Oh man.
But the thing is, ranged destruction spells are pointless now. Destruction in this game was always gimped, and the only thing it had going for it was Impacts stagger. Now crossbows can do that, and more often to boot.
IE: no waiting for magika to recharge if you're not abusing Enchanting.
It also has significantly more damage, the ability to sneak attack criti, able to be enchanted, has special bolts, and can be smithed to become even more OP.
I mean unless you really want to be a 100% pure mage there seems to be no real point in leveling destruction now. At least thats how I see it.