Rarbg actually let me know of new releases quicker than any official site. It’s the thing I miss the most about it. Hoping there’s something similar.
There is a group trying to copy it at therarbg.com. Standards are not as high as rarbg as it appears and content is still being imported, but the interface is familiar.
You can also try bitsearch.to, which is just a general torrent indexer for torrents.
Neither is as complete as rarbg was. Ideally therarbg and others will come to fill its place.