Lest we forget, Matchroom did snooker long before it did pool. I suspect the need to say things like "the blue two" on Matchroom telecasts/streams derives from the fact that the blue is associated with five in snooker. To get snooker fans to tune in, these clarifications may be well-judged. Commentary must cater to the run of the mill viewer more than pool diehards like you and me.
Accu-stats do a great job, but they are not trying to reel in snooker fans, who are not especially numerous in America. As you suggest, they cater to a different kind of viewer.
i'm not sure about it being directed at snooker fans as much as at casual viewers of sky sports / viasat. the first time viewer problem is inherent in the game of 9-ball (a good experiment is to watch a game with a non-pool player). the ball row in the bottom of the screen is an attempt to mitigate it but it's counteracted by the younger audience consuming their sports on handheld devices.
i've had a suggestion for years that the lowest numbered ball should be digitally illuminated for every shot. could just be for half a second, the two ball flashes blue etc. i may be underestimating the attention span of people, but it does seem awfully short to me..