The Preview Patch notes for 25.24 are here. From Riot Phroxzon via X (Source)

Zaahen
- Zaahen has been off to a powerful start, and after the micropatch nerf, he’s relatively stable
- For regular players, he’s stabilizing out, but seems a little stronger in higher levels of play right now, especially with what we’re seeing out of his early mastery growth currently
- We intend to nerf him in 25.24, but haven’t yet decided what nerf or by how much and want a bit more information before we act
- We don’t think he’s so overpowered currently that he can stay in this state
Bloodline
- Bloodline has fallen a little behind Alacrity especially for most champs, so evening it up a bit there
Jungle Changes
- We’re monitoring a lot of the feedback coming in over the last patches about the jungle changes; doing a few small tap downs to get some of the top end into a better state
- Overall, some of them are still not particularly viable, but not looking to take another swing at them at this point
Mel
- Mel‘s changes this patch are aimed a bit at reducing frustration
- eg. The lingering of her E zone and the particle are slightly mismatched (this follows the behavior of several other similar types of spells), but is resulting in a little more frustration than we think is worth it
- E max is also being reduced in power level and being a little more costly for her to cast