I've triumphed, at last! --but I will post my comments on this thread, rather than the REVIEW section, Null Null, as if I were only playtesting your mod.
You see, I'm afraid that few FRUAites will finish it in its current condition, due to the extreme difficulty of some of the combats. Particularly, from level 8 and down, there are a number of fights that are close to unwinnable:
20 Vampires, coming in from three directions, and getting surprised by a group that includes 2 Wizards with DB Fireballs being among the top.
There are also tough fights that can be avoided (such as against 30 Iron Golems), but which a player has no means of so knowing, unless they go a different path, first. If you would have one of the ready-made PCs drop a clue before hand, that one path is wiser than another, you might save potential players much frustration.
You might also add a comment at the beginning of the mod, to clue your players that they might want to make sure that Lara, the cleric, has some spells memorized before they take even one step forward...
I enjoy a good challenge, so the harder combats were pleasing to me (despite many reloads when my luck was not just right), but I fear that they will prove too frustrating for most players.
It would be a shame to lose them on that account, as otherwise there is much to recommend the mod. The overall layouts and individual dungeons are imaginative and well-thought-out. The backstory/relationship of the main baddies has a nice twist. And the use of a large variety helped keep meeting up (yet again) with UA's standard monsters from becoming boring.
The occassional commentary/dialog from the pre-made party members was also quite nice, tho rather sparse for my tastes. More interaction between the characters, and maybe with the NPCs, could increase the entertainment value. Plus, as I mentioned, more clues and tips could be dropped for the players.
Like uydevotee, I also stumbled upon the "lich defeated" bug, where he appears and threatens us as we entered his castle, but has already been "defeated" by the immediately following text declaration.
I do want to thank you for the fun time, Null Null, as I did enjoy myself playing this mod.