Quoted from Sinestro:When has throwing people at a problem helped much? You've obviously never led a software development project.
If the problem is your developers have too many projects on their plate, then YES throwing bodies at the problem is the solution (assuming the bodies are qualified, which they appear to be).
There's no good reason why in this time of relative prosperity for pinball, Stern can't be releasing finished machines, or at the very least finishing them in a timely fashion.