Peter, I think your proposal is superior to both the original Rococo and to
what I suggested. The Archer (or the Bird, but I prefer the Archer) brings
in a rifle capture element which is quite overdue. (Should the Archer
prove too strong, I would suggest to have it capture only at a distance of
a Knight's move (or only at a distance of two squares), so as to retain
the possibility of an Archer acting upon an Immobilizer.)
True, Ultima or Rococo probably shouldn't feature a Coordinator if there
are already four officers which capture more or less through relative
position (not to mention the King and the Pawns). However, although the
Coordinator is somewhat arbitrary and sometimes inefficient, it offers a
flavor of delocalized capture which I would like to revive into another
piece, maybe on a bigger board. How about a queen-moving piece which would
capture an officer (maybe not the King) by reaching its starting square.
Or by reaching the square it last occupied?