I'm not at my computer, so please excuse any mobile issues. I'm in favor of the move, because it will help to simultaneously connect and decentralize communications across the platforms. Say what you will about Facebook (you're probably right), but if they're that bad, then it seems logical to me to connect to their federated service even more aggressively.
The more we push our content (and by extension the Fediverse content that kbin aggregates), the less impact their algorithm can have. The more we go out of the way to expose their content, the harder we make it them to curate/censor/suppress any voices. And if, when comparing two Fediverse instances or softwares, we find that what's been pushed to them is different, we the users can call it out to news organizations (or make it public ourselves).
And yes, I know I'm making the arguments for supporting private companies in adopting open-source. It's about being able to audit what companies we don't trust are doing.
In addition to that, I'm currently a Threads user. Anecdotally, there's a lot of wholesome content on there that I appreciate, and what limited advertising is there is nowhere near as obtrusive as Reddit or the main Facebook platform.