Imagine forcing the good mods that actually wanted to keep r*ddit from turning into a shit show to leave by getting rid of their 3rd party mod tools and expecting the replacements not to ruin everything.
If the whole subreddit about saving 3rd party clients was to be believed, the first-party mod tools were pretty much useless, especially for those who are sight impaired. Though I can't say for sure since I was never a mod and my memory of that subreddit is a bit fuzzy.