The spawn rate of hostile mobs has been buffed tremendously, and even when you go into a bed, the next day there will be lots of skeletons hiding under trees. This is really annoying when you just want to build something and have to keep dispatching hostile mobs. After every thunderstorm, you have to deal with 200 or more skeleton horse jockeys, and that is definitely going to cause some trouble when trying to build something.
No no no. My friend, skeleton horses despawn after 15 mins if not triggered.