There's no meaningful deadline for evaluating JR on the 3C issue except end of the season.
Everyone would like to have a great solution signed right now. But reality is that our present cap-room shows that we could not have signed Bonino while making the RFA deals we did. JR seemed from be aware of that with saying already on July 2nd, that he'd get a 3C through trade.... and was comfortable waiting for the right deal to materialize even if that means having no C addition for the early goings of the season. He even made a point of referencing that Sully is OK with that as long as he Sid and Geno healthy.
Now.... we are obviously very vulnerable to a Sid or Geno injury right now. That is a fact. If that happens, one imagines that there is a certain amount of panic unless a WBS options or two blows our minds, and perhaps JR is forced to pay too much to plug a capable body in there. But that is what it is.
JR is making a calculated gamble here. Whether it proves smart or ill advised.... that is entirely up in the air. One should just know that he did not have a lot of options available to him. Both for cap-reasons and because of the expansion draft that sucked a number of C's from the market, there were very few relevant options. Further, we already have a large number of capable NHL'ers and budding prospects likely to make the cut too. We likely need to let someone go also to add someone real, hence a trade makes sense in any case.
Again, I am in no way disagreeing that having better C depth right now would be preferable. It sucked that Cullen chose Minny. But that being the case, I think JR is absolutely justified in keeping cool until A: the right option is there, B: there's reason to panic.