True, and I'm assuming that he'll be at 2 or 3 spell casts per turn, not 4. But still, that's the highest built-in casting bonus in the game right now. (Teclis auto-casts, so he doesn't count, lol!) It'll be interesting to see how much the Stormcast jump up in the meta when their new battletome comes out.
On a different note, while it's somewhat disappointing to see only Stormcast getting new dragons, I still like that they're going to be in the game. Because, you know, dragons!
I know it will be a while before our book comes out, but my hope is that we move away from being a synergy army with weak warscrolls and our monsters get buffed to be the powerful single combatants you'd expect a dinosaur to be, and our battleline gets re-worked to function better in MSU and without constant hero babysitting. IMO, we really don't need a brand-new centerpiece monster, our Oldblood on Carnosaur just needs to get buffed to perform that job. That model deserves to have stats closer to a Stonehorn or Maw-Krusha.
Also, now that I'm rambling about units, the new Troglodon in TW:W2 is a perfect example of how that unit should play. A monster with a powerful but short-range spitting attack and some lower-level spellcasting. A high-damage, high-rend shooting attack but with a lower number of attacks and 2 spell casts per turn would make him go from rarely picked to a near auto-include in monster-heavy lists, I think.