The whole bi/dipole thing was a gimmick to try to make up for the differences in a living room compared to a theater. In a theater you usually have 1 pair of surrounds per side, plus rear surrounds. Also, in a theater surround speakers are usually at least 10’ away from the listeners, allowing for a wide coverage area.
I’ve found in modest living rooms 1 monopole (i.e. normal) speaker per side is just fine, if well matched. Fortunately, most HT processors these days include the ability to match speaker’s tonally.
Do you really hear deficiency’s in the Focal’s or are you just trying to match the quality of your system? Not that I'm a Focal fanboy, just wondering what it is you are missing.