Don't forget the 70D. This may be a 37.5 Mp camera with dual pixels. Use different exposures on each half-site, and you get expanded DR 14bit or 16 (like the ML trick).
Canon could also bin the pixels normally, but for tele, if cropping is desired, the unbined version could be selected (sort of like the Nokia purview).
Another alternative is lens correction. Due to the high sampling, distortion, CA, etc. can be corrected first with little loss before downsampling for storage.
Lots of things that can be done.