Groves is cooked imho. Canelo would likely stop this version of Groves. TBH I think he peaked in the first fight with Froch and slowly declined since. That version of Groves would be a different matter...
Have to see Canelo against lesser opposition at 168 to know anthing yet but he is really short for a super middle, he might have to eat some of his special cow meat to have a chance.