Personally, I'm kind of excited for it the step up to a pro body...although I am finding all of the "Waaaaaa, it won't look like my pre existing APS-C body!" comments highly amusing! Particularly the ones that say it will be a deal breaker, no matter how good it is, if it doesn't have the body format they expect and want.
I think Canon wants to differentiate this from the existing APS-C bodies in a variety of ways, given that it is going to be more expensive in than any other APS-C body ever. I suspect it will be a different kind of animal than we've ever seen from any APS-C camera, in terms of AF, Speed and buffer (although I suspect it will only be a moderate improvement in IQ over the 70D, but time will tell). I think Canon is seeing if they can redefine what an APS-C camera CAN be--and I'm very excited to see how that pans out!
That's my thoughts anyway.
It is a deal breaker, because when I am slogging through the bush with a camera strapped to my back, having a massive body is a decided detriment. Big bodies are for studio use primarily, where size doesn't matter. And if you are in a studio you don't need a crop sensor. If you are out and about, where mobility is important, a large camera body is a problem.
I'm not trying to troll... but have you tried to slog through the bush before with a 1D style body? That extra inch or inch and a half sticking off the camera, in my opinion, don't make a big difference.
Also I don't think an integrated vertical grip is just for studio. It's such a great feature when mounted to a lens with a lens collar that attaches straight to a gimbal or ballhead. It make rotating to portrait very quick and easy to take a photo.