Maybe this is a minor point, but it's not CCR vs. OC that was the issue, it's tech vs. rec. The problem was that the divers in the water had a deco obligation, not that they were on CCR. It would have been the same issue if they were diving doubles.
Assuming that they were far enough away from the boat that they couldn't hear the usual weight banging on the ladder recall system, an OC tech diver's bubbles wouldn't have been very helpful. It's fine if the operator says no planned deco stops because of operational issues like this, but as a CCR diver, I would resent being kept off of a dive boat if I was going to stick to NDLs.