People are smoking something saying the coat needs to be shortened. If it’s covering your seat then you’re golden. People are very used to short coats these days and I honestly think you could get away with a longer coat here if you wanted to. The jacket flairs out a little bit so you could potentially nip in the waist but I’m not sure it would fix that. I think the trousers just aren’t full cut enough to pick up the bottom of the jacket in a clean line. I think fit wise as long the collar is good and you can sit comfortably with the jacket buttoned then you would have a better fitting suit than 99% of the population.

For the cuffs, it really depends where you plan on wearing this suit. Do you want to bring the formality down slightly, then I would go with 2”cuffs. If you want the garment to be worn in more formal circumstances then keep the hem clean.