Ever since the new update, enemies are suddenly able to see you through walls. This is EXTREMELY irritating when I'm just sitting inside my home peacefully with 15 enemies bouncing around my roof and shooting crap at me. It makes it hard to leave the house, but more importantly, it's just ANNOYING. Ridiculously so. I'm sick of hearing constant growls as I'm farming. On a second note, I think flying enemy AI needs to return to the way it was before. They used to take a quick potshot at you as they passed by, but then kept on going. Now they just stick to you like glue and literally the only thing you can do is kill them, which is very hard to do when you're just starting a character, as they constantly get out of your range and deal crazy damage.
Yes, keep bringing on the notice that the flying enemies in particular are extremely overpowered at the moment. They need to do something about that so that exploring the surface isn't scarier than being near lava level in the underground, and so that you don't feel like your high tier armours are just butter. Fliers seem to be floating around your house constantly at the moment and they see you through your roof even with the wall backing, which makes no sense. I've found that if you're out in the open and they chase you you can throw a pile of dirt around yourself and dig down till you're far away enough for them to stop noticing you (as a temporary way to deal with it). Ground monsters seem to have a smaller range of this seeing through walls thing and I've still been able to sneak around a lot of them unnoticed when mining. But it is annoying when they do notice you and get stuck under an overhang trying to jump at you.