Can't comment on the rest of your post as I don't have the DC3, but it's only fair to mention that Just Flight DO offer a no-quibble money back guarantee.
It's not stated as such in the
Terms and Conditions on their website. That is why I was so cautious in the first place!
Naturally, we will provide a replacement or refund in the rare event that an item is faulty, although please bear in mind that under Distance Selling regulations we are not obliged to refund items of software that have been opened unless they are faulty.
That is a long way short of a no-quibble money back guarantee!
As I said earlier, it really is down to the consumer to be extremely careful with their money. This history of sub-standard product seems unlikely to change, whether it's through incompetent beta testing, poor or uncaring developers, or simple economics based on the business model that it doesn't matter how bad it is, most will still buy it. I'm sure we can all name those developers.
At the end of the day, we only get to find out how good a product is after its released to the paying public. And too many obvious faults are coming to light only after it's been bought and paid-for.
That isn't satisfactory from the consumers point of view and in the longer term, extended gestation or not, is likely only to result in the unwelcome attentions (unwelcome from the developers point of view) of legally-empowered consumer protection organisations and the hasty departure from the market of these corporate non-entities that are actually not companies at all (Just Flight being one exception, to be clear) and therefore having no professional indemnity or liability insurance, probably no tax status, and no culpability or recompense procedure for consumers.
In the meantime, I really think that avoiding purchases in the days and weeks after initial release is the soundest judgment. If the developers want the money up front, then all they have to do is make it right first time.
The great thing from the consumer point of view is if there's an ever-increasing list of developers that are going to have to wait for their income, they WILL have to comply with supply and demand.
And if there are no early-adopters, the ONLY policy that will encourage people to take the risk with their own money is a full, no-quibble, money back guarantee.