<The real question is, at what point in time is it fair to surrender efforts if a solution doesn't arrive in a "fair" amount of time? I think this would go for any business in this situation. There has to be some defined agreement as to how long one is expected to sit idle. >
Photohigher seems to be operating in good faith and certainly is doing as well a could be expected. This is a new system and it seems to be understandable that will take a while to get to its full potential. Developing a stabilized gimbal is more challenging than developing such things as a quick release plate or accessory bracket.
Maybe it would be best not to expect stabilization technology to work "right out of the box", no matter who makes it. And if you want to use it for professional work, it's always best to practice and test any equipment before taking it out on a job.