They should make it a really good one week race before they think about adding days to it. Maybe 9 days is fine (like the Tour de Suisse), but making it 10, or 11 days, would probably entail having to add a rest day (like the Volta a Portugal) - and if the race is being planned as part of Tour de France training, they don't want it to be TOO long as it will put people off using it for that purpose.
What I'd like to see is them adding variety to the route. Looks like they've started on that this year, and it's a good thing. We can't have them relying on Bonny Doon and Solvang every year. Some races may rely on the same finishes every year (the Vuelta a Burgos and the Tour Down Under are two that spring to mind) but at least until you've established the event, you have to show variety to make the race seem progressive - i.e. we're looking for new ways to challenge the riders and improve the race.
Of course, sometimes the experiment will fail. Big Bear last year was a dismal failure. But the organisers, from the looks of things, have taken note of that (note them hyping up Mt Baldy as the first MTF of the race, when last year they were calling Big Bear that) and learnt from the mistake.
California, quite clearly, is not, say, Portugal, a country with enough varied terrain to change from year to year but with at least one climb that is so much bigger than everything else out there that it has to be used. It quite clearly isn't Italy, which has so many high mountains it can find two or three new ones to use almost every year. So take advantage of that. There should be some level of stability - if something works, keep it. Maybe not every year (the Volta doesn't go to Gouveia's cobbled climb every year, or Guarda's steep finale), but certainly make a note to go back regularly. If you have a good route and go back to all points every year then the race can't change. If Mount Baldy works, maybe go back there next year. Then look at what other MTFs can be added. Could they be added alongside Mount Baldy? Or should they take its place one year?