To expand on Dave's comments, let's just think in terms of days and sites. You've listed about 15 places you'd like to get to, many for multiple days. But you only have 14 days to work with, and that includes at least three days of driving as well as a day or so making flight connections, dealing with rental cars, and other necessities of travel. It just ain't going to work! So prioritization is not just beneficial, it's absolutely necessary.

From your own description, I'd plan on a couple of days in the Seattle area, one day in the Portland area, one day in the redwoods, a couple of days in San Francisco, a day in the Monterey/Carmel area, two days on the PCH down to L.A., and a day in San Diego. That's ten days, leaving you just enough time for the driving, etc. That doesn't mean you get to see the Oregon coast, just that you have to do it on the move, taking short hikes at some of the many seaside state parks as you make your way from Portland to the redwoods. The same is true of the PCH, you'll need to budget your time at major sites in the Monterey/Carmel area, and spend far less time at all the other beach towns along the way.

You can, of course, alter the time budget I've suggested. But before you add time at any additional stop(s), you'll first need to cut that time from somewhere else. Your choice, but the choice must be made.

AZBuck