There are close to 20 on the farm. Not one has bad feet, infact, the worst feet in the last few years belong to a draftx morgan. Some take a while to transition from shod to barefoot, and some have thinner soles(just like any breed). The BO's mare and three grown foals out of that mare have amazing feet by any definition. Treat each as an individual. The OTTB's mentioned above are 1-22 years old, many recently off the track.
Generally they are hotter than the average horse, but again, treat them as individuals. Some of the horses on the farm are super quiet, to the point of being beginner safe. Some are hot, opinionated handfuls that should never be handled by the inexperienced, like my BO's main saddle horse. Some are great on trails, some love to jump, some move well enough for dressage. Depends on the horse.
Most of the ones on the farm winter fine. About 2/3 need a decent amount of oats and beet pulp to keep weight, but nothing extreme. I would say maybe 5% had major issues with winter for the first few years. These are typically the ones raised in the southern states, then shipped north. They are blanketed and fed lots of extra feed.half the ones on the farm right now are on a diet, they are so fat.
That said, the winters here are very extreme.