Yes, I understand that there is a desire to salvage the employment of people working on the existing space transportation industry, and particularly the Shuttle components, and that is what is driving the DIRECT design (and Stephen Metschan has weighed in with the conventional false wisdom in comments over there, about the problem with launch costs being one of Isp). The argument is that by using existing parts, we save on development costs. Which is true, probably. If development costs are all that matters.
But, you know, the reason we want to shut down Shuttle isn’t just because it’s “unsafe” (as though safety is a binary condition), but because it kills people at such a high operational cost. And the reason for the high cost? The very thing that they want to preserve, which is the standing army that supports Shuttle.
Now, in the unlikely event I were called to testify before Congress, the first thing that I’d ask them to do would be to ask themselves what goal they are trying to accomplish. Are they trying to accomplish things in space, are they trying to make us seriously space faring, or are they in the business of preserving/creating jobs (note, not wealth)? If the latter, then by all means, come up with Shuttle derivatives. If the former, we need a clean slate.
Sorry, but what some see as a feature, I see as a bug. If people like that feature, then let’s go ahead and keep space access expensive forever. But don’t give us this Bravo Sierra about how it saves money.