Its still stupidly using four phones instead of one facing up and some optics consisting of four mirror strips tilted at 45 deg angles to cover all four directions with a single camera.
Also it would be neat to include a couple of die packs that go off either on remote command or if the thieves attempt to destroy the package. 
It would be difficult to use a single camera, without either significantly losing image clarity/focus/quality and/or spending too long developing such a solution, for such a small quantity production run. Given how cheap, lower end phones can be.
I.e. If the 4 phones cost $250 in total (EDIT: Multiplied by how many sets he needs/uses, but the design intention seems to be, that only one or so, set of 4, will be needed), that may only pay for a couple of hours work/engineering time, but doing a proper, one camera solution, may take many tens or hundreds of hours, to do well.
He did seem to say he intended to keep on re-using the package, after it has been 'rejected' by the thieves. But that didn't quite work out too well, in the end.
Using a dye pack, e.g. UV ones, could also help, if you needed to call in the police, and somewhat permanently 'mark' the thieves, with evidence (presentable in court), that it was them.
I think some dye packs, have tiny little micro-dotted (or DNA'ed), tiny specks in them.
Which provides great proof that they were the actual thieves, for potential later prosecutions.