There is very little evidence from the form that F&G wants heavy ground..in fact just reading the form in a very simplistic way..the last time he encountered heavy ground he lost at 30/100..suggesting a run well below his best. Yes it was fto..but he had no trouble winning fto as a 3yo.
the horse that day because he was a non trier, was not fit and the jockey rode an insufficient race.
I think Fame And Glory goes well on heavy and will stay more than 12f, so that should be a huge positive