Todd, I don't remember which Mojave areas rotated or how much. If there is a fault within a block that rotates, then yes, it woudl rotate also.

As for the Santa Monica fault: it bounds the Santa Monica Mountains and the Mountains rotated about 90 deg. It was active during extension before about 5 million years ago, so it existed when it likely had a more N-S orientation.

As for activity: there are recent publications on the fault: Dolan and others 2000 (GSA Bulletin?) reports on a trench across it which proved it is "active", meaning quake in last 10,000 yeras, but quakes that reach the surface are rare...only every few thousand years. Another about long term activity (millions of years) is by me and others: Sorlien and others 2006, Journal of Geophysical Research. Give me an email address and I can email you a .pdf, although it may be a bit long and boring...(but good figures at least). The .pdf is a couple of Mbytes.

Which active features? Dolan documented that there are scarps along it that date from the last earthquakes over the last tens of thousands of years. It is likely to have 1 or 2 mm/yr of slip, which onshore is partly left-lateral and partly reverse. If 2 mm/yr, and 4 m in an earthquake, then it should have a M7+ quake every 2000 years. Or, more often if the quakes are smaller. I work on the offshore part, and to have a quake larger than about 6 1/2 the offshore part would have to also break. But, a coastline is no barrier to an earthquake. Complexity and the near offshore split of the Malibu Coast fault from the Santa Monica fault could be a barrier to some but not all quakes.

A M7+ quake that include the onshore fault would be rather catastrophic. This is just an opinion: I have not seen an engineering study/3D ground motion simulation on such a quake.
Chris