I installed the beta yesterday, and spent ~10 hours or so experimenting and trying to get a handle on the game.
Some initial thoughts follow, and then some questions that others can hopefully answer.
1. The game has a steep learning curve. It takes only a little while to figure out the really core mechanics, but it takes a lot longer to work out anything like a good strategy. It also took me a while to figure out things like the fact that pioneers could build structures on unconnected resources.
I hope the full version has some kind of campaign on pre-made maps with helpful suggestions that actually teach you how to play; this game is quite different from other 4X games (which is a good thing), but it needs more mouseover text and hints to help teach the player how to play.
2. The map generator needs work. I had multiple maps where I only had a tiny area accessible and was blocked off from the rest of the world by mountains and ocean. I had one start even where I started at the end of a peninsula with one empty tile, 1 farm tile, and then an impassible channel separating me from the rest of the world.
3. The world feels very empty. Many maps have large stretches of barren wasteland, with nothing useful around at all. Cities seem to have to be a loooong way apart. Is it even really possible to build a city somewhere that isn't near a food resource, which appear to be very rare?
4. The economy seems odd. It seemed hard to get gold until I built a palace, and then gold was just flowing in like crazy.
5. Many spell descriptions are insufficient. "Damages the enemy" or "summons a mighty creature" are not good enough. How much damage? What stats and abilities does the creature have?
6. Stability is pretty bad. Lots of crashes, particularly any time I try to load a game while already in a game, or start a new game while already in a game.
7. Captured Empire towns keep all their Empire buildings while I am able to build a full set of Kingdom buildings too. This is a balance nightmare.
8. Quest balance seems weird. I went for an adventurey tech path, and got a quest that gave me a Red Dragon, which could then obliterate anything else on the map. Also, there don't seem to be enough different quests in the game yet, but presumably this will change over time.
9. In general the power curve feels off; in both economy and in military, the exponential rate of power growth feels too overwhelming.
10. Some minor bugs:
Mining tech doesn't seem to do anything.
Burn enemy and firestorm appear to be bugged; they say they do X% damage, but actually seem to do X damage.
Ironeers and any designs based on them seem to be unbuildable - and its unclear how they differ from peasant bases.
Questions I haven't quite figured out yet:
a) What do shards actually do? I build the shrine and I see that I know have that shard... but how does that help me?
What do caravans do? They appear to be moving resources around - where does this come from? Do cities just need to connect to the capital, or to each other? Where is their income reported? Is only a single caravan needed to connect any two cities, or are there returns from more caravans?
c) How do I get a champion? I see several references to this, but I don't see how to get one. I've have inventors, farmers, merchants etc. but no champions. I saw a handful of adventurers for hire in the early game, but they all disappeared (and were very expensive to hire in the early game).
d) Why would I want to give essence to a champion (and thus reduce my sovereign's mana pool)? Does this let them cast spells?
e) Early magic techs give me all kinds of artifacts and things, but no real way to build them. I still haven't seen any way to get crystals - where do they come from? Is the idea that these techs are giving me the ability to buy these?
f) How does essence work? I seem to recall from various previews that there were supposed to be various tradeoff ways in which I could spend essence - how do I do that, and what are the tradeoffs? It seems like essence is just a mana pool. That refreshes over time.
g) Why would I want to put points on my sovereign on anything except essence and intelligence? They're rapidly outclassed in melee by constructed combat units.
h) For the various summoned magical creatures - do they have some kind of upkeep cost?
Anyway, the game looks promising, but is still very incomplete.
I'll post more thoughts once I figure out how to play a bit better.