As development on Arctic seems to have halted, Blorp seems like a promising alternative for its Piefed support, but could use additional quality of life features. Among the most important of these from Arctic is additional granularity in post filtering, ensuring that posts one doesn't want to see can be excluded without impacting the visibility of other posts.
Beyond just filtering keywords, options to apply distinct keyword filtering for post titles, content, URL, OP username, and community name would allow users to preemptively exclude content they aren't interested in. Furthermore, via regex expressions, terms can be combined to increase efficiency and maximize the scope of the filters.
Here's an example of how Arctic handles it, with several of my own regex filters.
I love Lemmy, and I don’t wanna tune out of politics, but the fire hose of US politics is really bad for my mental health. I need better filters if I’m gonna keep using Lemmy. I just need a few people to validate my idea before I sink time into building it.