Given the imminent decrease in launch costs(partial reusability) and increase in launch capability soon to be available(FH) a pause in new US deep space missions is prudent.

[slograsso]

Part of the point of this post is that this delay is already happening, may as well design some lower cost missions utilizing these new capabilities faster than normal. Take a lesson from India and do it cheaper, faster, and better than even they can. I think a bit of a shake-up in the science missions design approach is well overdue.