More frequent outages, ads in replies, a rather silly new verification system, viewcounts being visible on tweets, Musk publicly mocking a disabled employee, etc. I don't hate Elon, but the dude should really leave Twitter ASAP. He's an engineer, not a people person — I don't think he should be in charge of a social network, a service entirely focused on social interaction.
Meh, I haven't experienced any of those things. The view count is useful for me at least, less of a black box. The old Twitter didn't really seem to care about adding new features.