DREDGE is great, and does overlap with Sunless Seas in some ways, but is nowhere near as story driven (or weird). That said, it’s a lot easier/more forgiving, and has a simpler (and potentially more engaging) main gameplay loop.
I love the Sunless/Fallen London setting, and really wish Seas had some of the improvements of Skies, as I think I prefer the setting of Seas, but I’ve found it hard to go back to, having played Skies.