Yep, not easy to cater for each suspension system. Whole different animal.
Many people now expect independent suspension in an offroad camper trailer, so I would be inclined to agree the market has gone that way. I assume it's evolved that way due to a bit of a chicken/egg scenario - what happened first? Was it people saying they wanted the independent suspension so the manufacturers did so, or manufacturers saying "this is better, you need this!"? I suspect likely the latter initially, but now the former.
What made the DoT's popular was a simple but effective $23k design (Leaf sprung etc). It was old school reliability that catered perfectly for its market as there was nothing like it.
Then someone suggested Independent suspension, I remember Luke was against it at first but gave in, then came I-kamper, walk up, airbags etc etc etc..
Everything that made the DoT what it was (a simple but rugged bashable trailer option) was now just a different version of the Patriot in a very competitive market area($40k area).
Now your left with a overcomplicated $40k version that is so far from what made the Drifta brand so popular and effective in the first place. Keep it simple.
Just my opinion, from a long term Drifta fan.
One has to suppose that Luke is looking closely at his numbers and is following the trends of what people are ordering to determine "what the market wants". Maybe all he's done is evolve to follow demand, rather than over-complicating things on purpose. You can't keep everyone happy, but my suspicion is that they were trying to with so many options, and its come back to bite them a little. Also, customers evolve (as per my comments about suspension options). Is a $20k "builder's trailer" still going to be what enough people want in this day and age to be sustainable? It would appear from this decision that he doesn't think so...
We have to assume that Luke knows what he's doing and has done his homework. From the post on Facebook it appears he is well aware there's going to be people out there who are disappointed, who wanted something at the $20k end of the market. You simply cannot please everyone and offer every option under the sun. I'm impressed that they have pulled it off as long as they have, to be honest!
I really wish Drifta all the best with it. It's great to see a home-grown Aussie company doing great things, and if for them to be around for years to come this move is necessary, so be it.