We have an upcoming release version 0.11.0 (to be released in the next 7-14 days)
Which fixes several bugs, as well as improving performance. New features include, tab-completion in the console, Message Box GUI and a Launcher.
This is largely a maintenance release, killing bugs, improving performance and adding a few new things.
0.12.0 should be more feature packed release.
Although we have had a round at speeding things up there are still a number of things we can do to improve performance for the engine.
The Launcher although allows selecting multiple esm/esp files, OpenMW currently only supports one esm. Esp file loading is yet to be introduced.
For The following release(0.12.0); the user interface will receive a lot of attention. Including The NPC Dialogue System.