I didn’t claim that it did so I’m not sure what your point was meant to be. I followed the part you quoted with “(though they still hide it at NPCs instead of just building it into the UI to give it the best impact).”
If merc mode were more easily accessible and visible the queue times wouldn’t be as far off. Some people don’t even know that it exists. It isn’t advertised anywhere in-game.
There are also a lot of issues in retail PvP that have nothing to do with anything being discussed in this thread such as class design, class balance, racial balance and PvP gearing being better in PvE than PvP.
Since item level matters a lot in BfA PvP (even with ilvl scaling in PvP) and Horde seem to be the favored faction in PvE as well, that likely contributes to faction balance issues in PvP.
Of course, none of that is relevant to the topic or point that CRBGs do in fact lead to lower average queue times than single server queues. They don’t result in world peace and the solving of all problems, but they do in fact have a substantially positive impact on average queue times.
If they didn’t exist in vanilla it wouldn’t even be a realistic discussion in terms of whether or not we’ll see them at some point in Classic, but they did, so we might. It very well may depend on average BG queue times in Classic. If they’re really bad and people are complaining, maybe we’ll see battlegroups and CRBGs sooner.