I think this change is mainly window dressing: the outgoing CEO was committed to self-driving car research, as is the new guy. The fundamentals of the company are unlikely to change.
I suspect that the stock would go up in the short term if Ford started putting more money into SUVs and crossovers, at the expense of the company's long-term success. If Ford's investors believe that self-driving cars (or at least, semi-autonomous cars) are the future, they should be willing to put up with a low stock price over the next few years.