Maybe, maybe not. Consider it in terms of your own workplace: if you worked on a team of 10, and one person got laid off, would that seem so huge? I think the question is whether this round of layoffs is in response to an acute cash flow issue or just part of long-term financial prudency. They fact that they waited until after Christmas and are providing 8 weeks of pay and benefits makes me hopeful that it's the latter.

Also, given that Falcon 9 is now essentially "done", I expect there probably is a fair bit of internal capacity that's accumulated during its development which can be cut. For example, SpaceX is famous for building a lot of components in house, but perhaps they'll move more to using subcontractors for Falcon 9 parts. That might free up money to spend on R&D. The challenge will be to become leaner and save money in the core launch business without compromising standards. It'll only take a couple of accidents to trash their reputation.