but there is really nothing else to do besides signals
you can clean entire base in 1 day 2 days (thanks for garbage bag nerf, nose), base decoing is just a filler "mechanic", you finish deco and yeah, that's it, now you collect signals in style
digging stuff with metal detector is unrewarding, you either get scrap or trash that you only can use for scrap, but there is nothing useful to craft besides omega and parts for mining rig, fishing is... underwhelming, farming is a joke, "cave exploration" is useless unless you want more omegas
but the story event are "haha look at this thing"; "look at this weird picnic" (the game almost forces you to see it, you don't find it because you "explore the world"), "haha look at that warp arrow" (you just get your mail filled with junk), "spooky sounds from the vent" ("horrors in vent" idea goes nowhere), "haha look at this weird treehouse" (arirals and their rep are useless, unless if you don't have points for food ~20 days into the game, and their "horror" element was ruined by dev's actions), obelisk and wisps are flashy but boring, just avoid them while outside, that's it, the don't "provoke" actions from you