Spoilers
A lot of the points your bring up I dont agree with. The sexual scenes aren't bad. I wont say they are the best they can be but they are still really good seeing how many there are. And the game wasnt meant to be 'difficult' As 4mw said it's much more on the story based side and is why they didn't add a combat system. Act 4 is not finished the entire map will be open soon (I believe) besides the two areas you conquered. The reason you dont have to conquer the wildlands or swamp when you have the hords that reside there are because nothing is there to stop you. If you go to the fishing village and the people that control the village are controlled by you, who are you going to fight. Same with the wildlands. (Although I could see you fighting the centaurs but i believe there is a reason why you dont i just cant remember) act 1 and 2 are so short is because in act 1 it's the prologue if your prologue is longer than the actual game than wtf. That's why there isn't much content everything leads to the same area. Act 2 has a bit less content than 1 but that's because they had to end it once you found a lair so you can age up otherwise you would be to young for when you start to take over the city. Chapter 3 Has a lot of content in my opinion and if you know how to use your hand you can get a lot of it before the timer ends makes it one just enough content for it to be entertaining with just enough that you missed for you to want to play again. And as I said earlier 4 isn't finished and has a lot of content anyway. If you dont think there is much content just check the guide, I'll assure you there's a lot since most of the stuff in there is only the smut scenes, add the non sexual scenes and you get as much content as a lot of finished visual novels. Also lots of the choices are somewhat major. The dispair route with Maeyls gives you completely different content. If you dont impregnate that present you never see her again, but if you do and have treasure she will even stay with you.
The point about not being able to explore I kinda agree with but I think it's morof the fact that there wouldn't be much content and it would be hard to make. People would be horrified if they heard a dragon was rampaging so they would try there best to hide, and even if that wasnt the cause. They have to make consort scenes, conquer scenes and a bunch more. There's no way they would be able to keep the same scenes from before besides maybe the witch scene or something. Like take the farm scene. There's no way in hell these people wouldn't have ran off with there cattle. They have no protection and a dragon is rampaging if they stay they are fucking stupid
You are judging the game really harshly and the points aren't very correct. If you expected to get days worth of content in an unfinished smut visual novel chances are you wont find it. I'm not saying the game is perfect far from it in my opinion, but its already a 4 to 4.5 out of 5 when you talk about it like a 3 or 3.5.