No needs to split anything. Many people wants more pixels, let them have it in 5D III.
It`s obvious, Canon line is missing camera like Nikon D700. Canon just need to fill this hole and make it little bit better, not to be always behind Nikon.
Let`s call it 3D:
Small body (like 5D)
Clean ISO 6400 or even 12800 (not just acceptable, but CLEAN!)
Could be without video if it helps to make it cheaper
Could be plastic body (like 60D) if it helps to make it cheaper
This camera will not compete with 1D or 1Ds or 5D, because it`s different.
1D - for sport;
1Ds - in studio; large prints;
3D - weddings, events;
5D - landscapes
Why do people always want a fast full frame camera?
That's what the 1D or 7D are for - one a 1,3 crop the other a 1,6 crop.
I cannot see the point of having a lower resolution FF camera in Canon's lineup.
And before someone says noise - the current 7D does quite well with noise, the 1D MK IV is even better, noise is not a significant problem.
Adding another camera would be a problem - simply because producing another sensor would be expensive.
The 7D does well at high ISO with it's cropped sensor but that comes at the expense of noise in the lower ISO ranges. There are many examples out there of noise showing up in 7D shots at ISO 800 and below where virtually no noise has become the norm and is expected. The 1DIV has excellent noise handling but it's a $5K body and a larger sensor so noise handling SHOULD be better, it's still noisier than the best FF sensors.
Honestly, I don't care if producing another sensor is expensive. Last I checked Canon is a multi-billion dollar company so I don't feel sorry for them if they have to come out of pocket to produce something that their customers want. Canon has no love for you or for me, ultimately we are just entries on a balance sheet so make them earn your business. To believe Canon is doing the absolute best that they can for their customers is laughable. They could have made a fast, FF camera several years ago but were quite happy letting their customers buy 2 bodies instead and if the D700 hadn't crashed the party, they would be just as happy to continue the status quo.
-- 8+ fps for my kids sports and any other fast moving action I might want to shoot
-- FF for wide-angles, better DOF at smaller apertures and IQ that still can't be matched by a cropper
-- Cleaner high ISO because I shoot often in low light and spraying speedlites all over the place is getting LESS acceptable
My current company of choice is Canon as I have been using their products for years. I'm giving them time to give me what I want as a consumer even though they could have done it long ago. If they don't, I'll support the company that tries to do so. When it comes to my wallet, loyalty to any manufacturer is a losing proposition........