well i like pieces indicating moves too, but as Fergus said, graphics
should be functional and possess beauty, and if we go crazy trying to get
every piece to indicate where it goes, i think that takes away from the
beauty aspect. We don't care for 'indicators' on the rook, knight,
bishop and queen etc, and well, as far as alfaerie graphics go, for
instance, the 'squirrel' graphic seems a pretty good graphic to indicate
a piece that moves as a knight/alfil/dabbaba. The name 'squirrel' also is
often
used for a piece that moves like this.
still, to suit all tastes and allow variety on game courier, it can't
hurt having a 'knight/alfil/dabbaba' piece like you want.