Yes, this is how I've been running my Magneplanar 1.6qr speakers for the past 5 years or so. I built a line-level buffer/crossover using the Linkwitz Labs MT-1 board which lets me duplicate the original crossover frequencies for the bass panel vs. the tweeter panel. I have two Harmon-Kardon Citation-II stereo amplifiers, thus 4 "channels" where each amp output is wired directly to the drivers (soldered directly with no connectors at either end). The amps are bi-amping 'vertically' where one channel receives its signal from the treble part of the Linkwitz X/O and the other channel receives its signal from the bass part of the X/O.
Getting rid of the speaker crossovers was a huge improvement, both in terms of clarity and pace as well as delivered power. The stock crossovers soak up a lot of power! In a typical third-order crossover like Magnepans, as much as 75% of the power is wasted in the crossover (or so I'm told). My speakers are MUCH more dynamic run this way than with speaker-level crossovers.
So, I agree with you that this is a superior way to drive speakers. The Linkwitz Orions fit this philosophy as do the Sandersound 10B speakers or the Emerald Physics speakers with Behringer crossovers. Then there's the whole single-driver camp using Lowther's etc. with no crossovers.
That said, there are many fine designs with creatively tuned crossovers that will NOT sound good driven directly. In particular, phase relationships between drivers and the perceptual effects of phase coherence adjustments are critically important to many designs. Not something to just be applied to any old speaker!