ALT may not provide "more" treble on those speakers, however if B&O invested so much in this technology, there has to be a reason; and if the tweeters are on top of the cabinet, even with a small motor, it would leave more internal space for the bass port/vents or even for an extra woofer, to provide more bass to these columns who do suffer from a lack of bass (which in return enhances the treble perception)
This whole "facelift" makes sense only if B&O use ICE amps instead of the bulky AB amps in Lab 6000/8000, in order to really allow more cabinet volume for bass reproduction. That was my whole "plan"
Reunion Island is greeting you!