The initial design clearly had limitations and the company has...

The initial design clearly had limitations and the company has already taken steps to remedy this issue. They are currently manufacturing the new design with major changes to help with the continuing use of the device.
As for the drop out rate, this was not unexpected as parents of autistic children will attest. Getting an autistic child to adapt to a new routine is extremely difficult, and coupled with the design flaws, a high drop out rate would have been anticipated to some degree.
Regardless, the focus will be on the success rates for those who completed the trial as this was their primary goal and this will be what drives the uptake of their device.
The full published article will answer many of the unknowns, so from here we can look forward to the company reaching its true potential