Beach Salvage is an extremely nice feature, at least for late starters. It's like a box of chocolates, you never know what you gonna get.
I started only recently into World 10, quite late, but beach salvage to a degree allows me to catch up.
One time I deliberately set out on a "beach run", with the goal of finding flax/hemp seeds that I was lacking and within 30 minutes I had 100 Q50 flax seeds I needed, much better than what I could've found in the wild at that point.
It's frankly a joy having a chance at "everything" when you still have nothing -clearing your inventory, so that maybe even the B12 of that drowned unreclaimed warrior can find space into your pockets, you never know.
Additionally, beaches are very beautiful.
Quite inverse to that are ruined settlements, they littler the environment are ugly and commonly very dissapointing.
When a village is being attacked all containers will usually be destroyed, leaving all items of the floor - just to dissapear into nothing shortly after which doesn't make too much sense, except for fresh organic items.
The same happens when a settlement decays.
There are so many ruins, that really have no justification for existing in gameplay terms.
If like on beaches you had a chance of finding decayed non-food items in ruins it would give them some purpose as a fun catch-up mechanic for newbies or hermits.
The specific implementation may pose some problems though, a global item pool for waterbodies makes sense taken with a pinch of salt, but does not with villages.
Would there be only a local item pool per ruin, or possibly a shared item pool but split between former village and personal claim pools for balance reasons?
Can a former claim even be turned into a spawn node?
Long story short, really dissatisfied with the way ruins disfigure the landscape.
Would tie in well with decaying pavements http://www.havenandhearth.com/forum/viewtopic.php?f=48&t=52810
Maybe the "harvestable" objects could be dilapidated or ruined buildings, if not for just stuff sticking out of the ground, like beach salvage.