I just finished the hack. I'm gonna give you my thoughts, but I tend to not articulate very well. Regardless, here we go.
To preface this, I skipped the story, so I don't have anything to say on that. However, I will comment on the fact that you did a good job integrating story and gameplay in a lot of maps. The world was very immersive.
Overall, I found the hack too easy and too simple. You often did a good job of forcing the player to engage the enemy, but the strategies that I used to fight the enemy were not very interesting. But I understand that that is not very constructive, so I will elaborate.
The early game was mostly good. None of my units were too overpowered, and, while there was quite a bit of bait and switch, every chapter had at least one or two tricky enemy positionings that forced me outside my comfort zone. If the goal was to have a bunch of not-too-hard chapters to focus-train units, it succeeded. In particular, I liked the escape mission in... chapter 4, I think? However, I did not like the gaiden chapter; it was too easy and I wasn't using my own units so the experience was worthless (this goes for the second gaiden chapter as well; I easily triviliazed it by simply putting two units at the western chokepoint and unequipping them, because there was no incentive to actually fight the enemies).
I think Chapter 8 is when the quality started to drop. Chapter 8 itself is not a very good chapter. It seems the most viable strategy was to let the green units kill themselves off, and then bait and switch your way to victory. In addition, Chapter 8 is the first time you can get a Master Seal in the game, which I immediately used on Torie, along with whatever statboosters I had (and I think most players would). Now, I need to talk about Torie for a minute. Obviously, she is the best unit in the game by a landslide. However, I actually like that she is so good. Her existence takes otherwise sluggish maps and makes them bearable. The problem is that with a unit this busted, a lot of maps just get their asses plowed by her and a lot of the design consequently goes to waste. The best maps were the ones where I had to split Torie from my party, like the one where Orontes attacks from top and bottom. That map was one of my favorites because it forced me to split Torie and it gave me an incentive to rush, which a lot of your maps fail to do (and that is one of the other issues with the hack).
So, I felt that the mid-game was not so great, which was about Chapter 8 to Chapter 15. Incidentally a lot of these maps suffered from the other problem, which was not having an incentive to rush anything. I don't even remember a lot of these chapters despite just beating it today. Off the top of my head there was the "destroy supplies" chapter and the "seize three forts" chapter... neither of which I thought were all that great.
The late game was more of the same, the only difference being that the enemies finally got tougher, so I couldn't spam Torie as much. There was a very interesting setup on chapter 18 (?), when you go north and the Captain attacks you on two chokepoints. However, I did not like the final two chapters. The super weapons you get near the end really allow a lot of the enemies to be non-issues. On Chapter 19, I literally just equipped Torie with the Crucible, made her move 10 spaces every turn (boots), and got to Aier pretty much unscathed. Aier himself was a pushover for Torie w/Crucible, and none of the enemies around him could even touch her. The final chapter was probably one of my least favorites. The most optimal strategy is clearly just to carefully bait and switch your way around a winding corridor, which was very tedious, and the final boss was incredibly anticlimactic.
I think you have a good grasp on enemy placement, after playing this hack, which is why I said what I did at the beginning. It's just unfortunate that that is brought down by the poor strength of enemies relative to the player, as well as the lack of anti-turtling incentives.
One of my personal complaints about this hack is how anti-LTC-friendly it is. I tried on a few occasions to cheese maps with some Torie Resuce drop strategies, but it never really worked out because of very meticulously-placed enemies. And on top of the game just working against me, you never really give the player any cheesing tools, like Warp/Rescue staves or even another flying unit besides Torie. Was this intentional? Being able to do some more creative strategies on these maps would really bump up my opinion of the hack, to be honest. Even though it would be "easier" that way, it would also make maps a lot less tedious. If there is a warp staff in the game, I might have missed it, since I did skip a few chests on my playthrough.
Another little nitpick I had was the controllable generic units. A lot of times they were just unnecessary and I didn't feel like moving them all. But I understand the point of them, which was a feeling of controlling an actual army.
Overall, it's good. The major problems of this hack are juggernaut syndrome, somewhat tedious map design, and too-large maps. I have played two other completed hacks so far, which are Requiem and Sword of Heaven and Earth. I enjoyed this hack more than Requiem but less than Sword of Heaven and Earth. If I were to give it a rating out of 10, I would give it a 7.
I appreciate all the hard work you've done on this project. I understand it has taken you a very long time to make, and as a hacker myself I can definitely tell the ridiculous amount of work put into this hack.
For the record, I think Mangs's analysis is too critical, and kind of shortsighted for judging the entire hack based on a single chapter.
Here was my ending team. Best units were prolly Torie, Melusine, and Samuel.
Favorite Chapters: Chapter 4, Chapter 10, Chapter 18
Least Favorite Chapters: Chapter 8, Chapter 9, Chapter 15, Chapter 19, Chapter 20, and the 2 gaiden chapters