I also like this mission. It was a bit linear at first but then I liked the dynamic story and changing locations in it. The vague non-standart and not-so-connected storyline was also quite refreshing. The starting area was harder than other parts - with its forced ghosting - but I didn't find it impossible or that frustrating as some of the commentators here or on TTLG. I think that problem with that area lies in forcing player to play certain playstyle (ghoster) which might not suit his/her ...
I personally haven't played Cube Escape series (maybe, in future), but if you like Coaxing the Spirit, - there is another FM Rose Cottage (also for Thief 2) by Saturnine - it is also big puzzle horror mission with distinct graphics and atmosphere (at least until the Big Reveal). Another a bit similar mission is Eclipsed by HipBreaker (for Thief 2, more open horror city mission). Some Haplo's missions (that series that begins with Unholy Vivid Innocence)...
I quite like zombies because they are different from so-called "living opponents". They react differently, express themselves differently. While I clearly understand that it may be confusing and enraging for many people, it refreshes gameplay and makes in more variable: I need to develop other tactics, listen to reactions of them because I should understand where and when they are noticing me. It is different experience overall. So I have no problems with rating of "Where the Unknown Lurks"))...
Is it only me who sees that you created several same, identical topics with this review?