The League of Legends test environment has updated! Here's the most recent changes I've been able to mine. Some more complex changes such as bug fixes and changes to spell behavior are more difficult to extract so I might have missed them and I am always improving my tools to get better results in the future. Visit the Current PBE Changes article to see all the changes currently on the PBE for patch cycle 14.9 which goes live on Wednesday 5/01/2024.
The only champion changes today were actually hotfixes which are going live so I won't put them here. Instead, I dug out the player icons and emotes for the MSI event.