Seasons will probably be a winter and a summer vacation spots. They would run into the problem that, well, the worlds, despite the instantaneous travel that sims are all capable of, all seem to be in different areas with different climates. In Sims 3, we could toggle off various seasons. For instance, in my games, IP never had snow. But in Sims 3, we could create our own seasonal lots, which was really fun. I can't imagine Sims 4 having anything like either of those. The festivals that City Life brought on are not only static, but fairly boring at best, and annoying at worst if you look at how everyone dresses for them.
