Is it worth it at all for singleplayer? Like there's stuff to do, or is it just like an empty server sort of thing? The store page isn't very clear.
Oh there's plenty to do.
Firstly there's "The Journey", which is a series of 100 increasingly challenging objectives arranged into ten chapters. They start off really simple, like "Drink", "Eat", "Climb" and get increasingly challenging as you progress through them, with certain objectives requiring you to explore specific locations or defeat specific enemies/bosses. The objective descriptions are often very brief and don't necessarily detail exactly
how to accomplish them, so you're expected to figure a lot of things out on your own (which is part of the fun).
Also worth noting that The Journey is also probably the closest thing Conan Exiles has to a story; the game even has an ending when you complete all the steps. Aside from that, there aren't really any cut scenes except for an intro, and only a handful of friendly NPC with any dialogue, as well as a few lorestones and notes that reveal some backstory to the game.
Secondly, the world has a ton of interesting locations, dungeons, bosses, and other surprises to be found. Exploration is definitely one of the highlights of the game for me. Playing on normal difficulty, it can get pretty intense when exploring a new cave or temple, having no idea whether you're prepared to face its challenges and knowing that you're at risk of losing everything you're carrying should something go wrong. On the other hand, it's pretty exhilarating when you stumble across a supply of raw materials that you haven't found yet anywhere else (assuming you're not using a guide of course).
Thirdly, there's the challenge of discovering how to most efficiently produce and manage the things you need. For example, it will feel super grindy when you first see what's required for crafting the strongest building pieces, but it becomes quite manageable later on once you start making breakthroughs on improving your efficiency and discovering better methods (I started playing in April and
still making significant breakthroughs).
Finally, there's The Purge, which is a rare event where a bunch of random enemies will try to destroy your base and you need to defend your base against them. This is great for single player because it gives you a motivation to prepare your base for defense, which otherwise wouldn't be there in single player without The Purge.
Now... With all that said, the game also involves many hours of hitting rocks with a pick, and this is why I'm hesitant to recommend it as a single player game. It's fine if you've got a buddy or two to chat with, otherwise I think it might get a bit tedious. That said, there are also settings you can change to decrease the grind, but I'm not sure what kind of impact or side-effects this might have on the intended experience (for example, if you increase material gather rates, then the Purge might not be much of a challenge).
The game was kind of empty when I played it, and enemies were either piss easy or impossible. Has it gotten any better? I really like Funcom's Conan setting but I can only play Age of Conan for so long.
I think the bosses are designed with groups in mind, so you might need to play a bit more strategically when approaching them as a single player or two player co-op (i.e. bring a good fighter thrall to assist you), and even then they'll take time to defeat. There are still many bosses that we have yet to defeat, but my buddy and I are still way short of our full potential, so it's hard for me to say whether we'll ultimately find them to be impossible or not.
As far as the regular enemies go, most of them are pretty manageable for us, aside from when we encounter larger groups of them, in which case we tend to just run away. Right now, only the snowy mountains in the north seems to be an area of uncertainty for us (and we haven't even set foot on the volcano yet).