If you could change one thing involving Warriors

Like you said, Ashfur going into the Dark Forest.

That Yellowfang and the rest of StarClan actually realized that Ashfur belongs in the Dark Forest and tossed him there instead. So basically what you said.

I would omit the entire ~Firestar is the fourth!~ arc and replace it with something that actually contributed to the plot.

He never had a kill count, but that doesn't mean he still isn't aggressive and wrathful. He literally encouraged his student to murder a child and almost murdered an innocent warrior for trespassing.

But that's my silly opinion

Dovewing should just be a normal apprentice instead of having powers, being part of a prophecy to save the clans, and having two toms that are in love with her. I consider her more Mary Sue than Firestar. Like, she literally has barely any issues. Her sister, on the other hand (or paw) has several issues.
I wish Hollyleaf had gotten powers instead of Dovewing ;(

I really don't like TigerxDove. Not really sure why..... But for some reason I wish they had never fallen in love.

Offscreen deaths. Like Rainwhisker and the greencough inbetween of Bramblestar's storm and the last hope. They should've been onscreen.

I would make Skystar kinder in MFV. He seemed to behave sort of like he did in TFB, only softer.

Cats actually died IN THE LAST HOPE no I ain't talking about the deaths in BRS, TLH defenders- I mean IN THE BOOK, where they belong.

Instead it was all like, "YAY BRAMBLESTAR'S LEADER WHOOOO" *massive party while Sorreltail and Foxleap are apparently dead or dying in the middle of camp*

Did the Erins actually expect us to really think that they can fool us? xD it was obvious Sorreltail and Foxleap's deaths were afterthoughts. Should have been in the book ._.

I would get rid of the powers.

Add more variation to the offscreen deaths. They do need to happen sometimes, but they are boring. Maybe have a cat get injured by a fox or an enemy patrol. Maybe have more cats dying in large battles.

This.

And maybe some pitiful but realistic way to die on screen like choking on a bone while sharing prey with the clan. Can you imagine how shocking that would be? Of course I think many people would hate this kind of death because it has no meaning but not every death needs to be elaborate and meaningful. Kind of the same with Honeyfern's death. I know many people on here don't like it because they think it was pointless but you know how surprised I was when it happened? It was sad but I had the same rush I had when reading the OS. Anything could happen.

Uмвяᴀ - That's something that always bothered me as well!

I know, killing cats just for shock value isn't great but it is actually a good way of managing clan numbers alongside bigger things that cause deaths. Plus it makes the series a little more realistic in a way. Cats in the wild will die from little things such as a scratch that gets infected and doesn't heal, or choking on a bone, or more illnesses other than stupid greencough.

But I see your point.

cats being smart enough to not fall in love with a cat across the border