Another feature I might suggest is an option to add an additional distance measuring head into the scanner. Note that I am not talking about adding a 2nd motor, just the part that measures the distance. It would need to sit right above the existing one.
The purpose would be to cut the scan time for a spherical scan by aiming the extra sensor module at a different angle. For example, if you wanted to scan a 90 deg vertical angle, and the extra sensor module were mounted at 45 deg above the other one, the scan would take half the time. Another variation is for the scan heads to be mounted aimed to the left by half of the angle between scans by the other head. The idea is to double the horizontal resolution at the same scan speed.
The changes to you existing design would be a new housing. Then you would need to allow for the two (or more?) data links to be integrated. I guess you could just increase the number of channels in your slip ring, but perhaps there is some way for the two (or more?) sensor modules to have their data streams integrated before the slip ring. Finally, the software would need to be able to accept the multiple scan modules data.
On a different subject, I was surprised at the low accuracy. Even very low cost laser distance meters have much better accuracy. Though, I suppose they can't deliver the continuous measurements at the rate you need. If the purpose is for moving robots, I can see how that becomes the critical issue. Knowing a more precise distance to something 40 meters away is not very important.
What does it take to improve accuracy? For my purpose, the scan rate is not a critical issue. But, accuracy and resolution is very important. Does slowing the scan rate permit better accuracy? If the current scan module can't do better accuracy, perhaps you can start to plan for other scan modules to be made available in the future.
Also, I mentioned the laser line type of scanner in an earlier post. Here is a link to one DIY type.
I think this technology is in the same position as when the Oculus Rift was being developed. The hardware had become relatively cheap, but no manufacturers had taken the step of actually releasing a low cost head mounted display for virtual reality. So, a new start up was able to jump in there, and make some big bucks while the big companies had to play catch-up. The laser line type of scanners have been VERY cheap to make for many years now. But, they seemed to be only made into very expensive commercial units, or existed as DIY instructions that most people didn't have all the skills to put together and program. No one made a cheap, fully assembled, 3D scanner until relatively recently.