I half wonder if Canon would have the courage to use a lower mp in the up coming 7DII in order to increase high ISO performance and shooting speed. If the new camera does turn out to be a 'budget' pro action camera the high ISO performance would be useful for indoor sports. I kind of doubt it. One of the big reasons for the 7d is to get more pixels on target.... If the pixel size becomes that of a FF sensor (or larger), that advantage disappears and with it a significant portion of the buying public.
I've owned both the 650D and 1100D alongside my FF bodies, and IMO the lower mp camera gave better overall 'IQ'. in fact the 1100D can produce alarmingly good IQ. I say 'alarming' because the 1100D cost about £250 and the FF £2500.
I see that the new 1200D uses the ubiquitous 18mp sensor. A pity IMO, but then I guess the vast majority of customers for that camera would disagree; the more mp the better.
So are we seeing Canon steering the customer towards 'high mp = consumer, low mp = pro' ?( Bearing in mind 'low' is still actually high resolution).If so the new 'pro' grade 7DII might be lower mp.
I shoot birds, usually in good light, and need all the pixels on target I can get. If the 7D2 had the same size pixels (8 megapixels) as the 5D3, there would be no debate as to getting A or B or possibly both... It would be 5D3 all the way.
I don't really agree because the crop sensors overwhelming advantage is its cheaper price rather than more pixels on target. The crop is disproportionately cheaper, most probably because the manufactures keep FF expensive. So for many it wouldn't be 5DIII all the way because they would not be able to afford one.
I'm not disputing the case for more pixels on target; it's just that that can be an additional benefit along with the cheaper system.
I wasn't referring to an 8 mp camera either, more in the region of 14-16, which in my opinion is high resolution anyway. You'd have to have around a 40 mp FF to match even that. My thinking was high ISO and speed, something where the new 7DII will have to excel over the likes of the 70D. BUt it's main 'advantage' is going to be the 'high end' ergonomics, which was my original point, but you will have to pay 50% more than the 70D for it.
I still maintain the 7DII will come in slightly under the RRP of the 6D, so it may well be more expensive than the 'budget' FF at inception.