Counter point, maybe it just accelerates the game of cat and mouse already played between bad actors and algorithm designers, possibly leading to faster iteration and improvement of their algorithm to find hard to fake signals.
It seems like the focus needs to be on what can fight back misinformation/spam better given the context: more speech or moderation. The need for human moderation will likely still exist, but if Musk wants to accelerate the process as you say, Bluesky seems like a good way to start.
If Twitter is making choices that increase their bottom line at the expense of community, then absolutely, more transparency and open source would help with that.