Wow...that would make me not buy it for sure!
I would imagine that's what a potential 70D would be for. I add a grip to every camera I buy and it's definitely useful for sports and any time you're shooting in portrait orientation. I think it would also enhance weather sealing for me since adding a grip always introduces another point of failure for the seals.
With or without a grip, none of these DSLRs can be considered small, I consider the benefits outweigh the minor drawbacks.
A non-removable grip is a catastrophe for me, as it makes the camera not fit where I want it, and it makes it heavier and bigger than it needs to be for the 99% of the time I don't need a grip. If you want a grip, buy a grip. I never have, and I never plan to. That's the beauty of a removable grip - those that want one can have one, those that don't aren't forced to have one. This is one reason I'd never buy a 1D body.
I'll agree with that sentiment; that is why I ended up with the 5D3 instead of the 1DX.
The additional capability of the 1DX was not enough for me to overcome the fact that it did not fit my small hands well enough, mostly because of the larger grip and bottom.
I am glad there are a lot of other people that feel this way
the grip is the main reason i'm not getting a 1Dmk4 for now if no new APS-H bodies are released i may get one anyway
I still use my 1Dmk3 in locations where its bomb proof build and weather sealing are a requirement and anything else would simply die. But i much prefer to use my 5Dmk3 or 5Dmk2. If a gripless 1Dx has been released I probably would have that.
with todays battery technology there is just no reason for the bulk other than the portrait shooting controls which in all honestly i prefer to use the landscape controls and tuck my right arm into my chest I can brace in a much more stable way shooting like this that using the portrait buttons.
Alot (Not All) of people that put grips on because it gives them more big camera cred, just look on youtube for people that give advice about how to look proffessional when shooting a wedding

I know there are tons of reasons and shooting situations where the integrated grip is superior just not for me or many others so I dont know why they dont make a 1D style non grip version with no dial full weather sealing and the same awesome build with all the features and give users the choice, I think canon would surprise themselves with how many non integrated grip 1series cameras they would sell.