Thanks for mentioning us! (Conjure.io). Firstly I want to say that it's sad to see Layervault go, they did such a great job in their execution, I wish they had gotten more time to make it work.

Now to the OP's points, whilst we're not strictly the same as LayerVault, (we don't track file diffs) there's some comparisons to be made.

Easy overview of the entire project;

Something like this? http://cl.ly/image/2m000S1k2h3C

Full history of every single file

We only show the history of files uploaded to conjure, but more coming with dropbox sync and desktop app soon.

Commenting (plus hotspots!), which helps us a lot when discussing a design;

This is why we were born!! http://cl.ly/image/2a1i0h3z0B0T, and a gif: https://conjure.io/site-assets/images/features-feedback.gif

The ability to just send someone a link and have them see what you're working on

Like this? http://cnj.re/jlLjb

So yes, some comparison! Our mission is to make feedback smarter... and we're only just starting on the journey. Big things launching this week!

Love to get your feedback on it ;)

Sam@conjure.io