It feels as though the Mod is just recycling the old stuff.
It's a lot of extra work, for little benefit. It also alters the gameplay drastically. It's going to be a hell of a lot more time consuming for us to tweak and balance a gameplay feature that has never been tried and tested in the original series, at least with the current features...we have something to base our work on and test against. Wherever and whenever possible, we are not only recreating the original features but tweaking and improving upon them as well....and our AI are certainly going to have some abilities above the originals.
Sorry to disappoint you, but we're making a classic Thief inspired toolset. It's supposed to play and feel similar to the originals...90% of what we're doing is going to be similar to the originals. We have systems that are also going to be different. We weigh the pros and cons. Then we make decisions based on where our time is best spent, and where system resources are best allocated. What's the point of implementing a system that will hinder performance? We saw enough of that shit with the renderer in T3. It's tough enough getting features we're familiar with ingame, let alone try implementing yet another feature to balance the gameplay against. It will be plenty challenging without silhouette detection.