That doesn't seem too difficult, replace the dome tweeter with a CD (compression driver) and a waveguide, modify the crossover, and wahlah I've got the ultimate.
In reading all the latest SEOS stuff, it seems you end up with a 75 to 90 degree zone of coverage with a CD and waveguide
and narrower as the Hz goes up, but they don't call that "beaming". They don't talk about harmonic distortion either.
What I'll do is, I'll finish my projects with the dome tweeters THEN do...