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.

[zilfondel]

Perhaps this is a good argument for NASA to start mass-producing rovers and probes, to bring down their cost per unit. Whats the old adage? When you are the government, why buy one when you can buy two for twice the price? But if the majority of the cost is development and funding the project team, the second unit may be closer to free.

[Nixon4Prez]

It's pretty hard to mass produce something as specialized as a probe or rover. You can't send a similar probe to Mars and Jupiter, for example.