I removed few bugs, now default arguments, and overloads are handled correctly. If you use autocomp outside function's block argument's types will be not removed (because outside blocks are only function's definitions/declarations).
I also apped patch for PlatWX.cpp - if you apply it your autocomplete listbox will be adjusted to widest match.
I think I finished this functionality, now I will work on documentation helper.
edit: patches are now in patch tracker.