1) The amount of transparency that this company shows is insane. I have a hard time imagining any one else in this situation sharing the way they do. I hope it works out for them long term.
2) The due diligence work they did for this deal was absolutely not a waste (even if they never sell the company). Having gone through this process once will make it orders of magnitude easier if they sell in the future (especially gathering and organizing documents from the very early stages). Even if they don't sell, the process would have shown light on potential liabilities and issues they hadn't even been thinking about. This is helpful regardless of who owns the company. Maybe not worth the time and money; but definitely not a waste.