I do love prints but not sure if this is too much. I have never had pony hair but some people say it goes bald, this is a big drawback. Leather improves with age but this might be the opposite!
I own the clutch version of this Lanvin bag. Personally I think animal print is better in smaller doses. Also, as you said, pony hair does bald over time, no matter who the designer, so I would avoid getting a pony hair bag to use as an everyday bag or as a shoulder bag, because it would rub against your clothes and accelerate the problem.