I was really missing but the ability to (de-/re-)connect to a given client, which 0.4.0 provides. In my opinion LT is not just a code editor (editing features are pretty poor yet indeed) but a code experimenting platform. And there it rocks. Even in alpha, it compares pretty well with Emacs Live in terms of stability and usability.
ClojureScript, Node and JS support is a terrific move. This means I may even soon use Brackets (another nice node-webkit project) less for live JS HTML coding and debugging and live mostly in LT.
Congratulations Chris and Co!