My understanding is UL issues. Specifically, the big, wide open space in the motor side of the upper blade housing. I've been told that UL is worried users will start the saw, then reach underneath to adjust something and stick their fingers into the blade housing.
I've tried the TS CMS module. Based on my experience, my opinion and advise is: Assuming you have access to NAINA items, unless you are the most casual of woodworkers, you will be unhappy with the CMS-TS, compared to a traditional table saw. The weakness lies in the fact that you are trying to adjust an upside-down handheld saw. Want to adjust the bevel? Get ready to get down on your knees, loosen the front and rear bevel knobs, try to read a relatively small, upside down bevel gauge, and then tighten the front and rear knobs. Certainly not impossible, but ponderous when trying to work at anything approaching production speed. Depth setting is a little tricky as well, since now you're not only fighting gravity, but the spring action in the plunge mechanism.
If you have access to NAINA items, for a little more money I think you'd be MUCH happier with one of the Festool Precisio saws, either the CS-50 or CS-70. The CS 50 looks like it's based on the CMS base architecture, but is a purpose-built table saw, with the added functionality of a pull-push saw. Another German tool manufacturer produces a saw called the Erika which is available in North America, but with a price tag of $3,000+ it is priced squarely in the professional market, likely out of reach for the casual woodworker.
I hope this helps! [big grin]